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Chemistry Lecture 4 For General Chemistry and InOrganic Chemistry — Transcript

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0:01Okay guys, so this is chapter 4,
0:03properties of matter. Noan.
0:08Okay. So let's begin.
0:11So properties of matter no? So ano ba
0:14yung properties of matter?
0:17Um how would you describe matter no? Ano
0:20yung color? Um
0:24ano yung feel nung material? No ah what
0:28about the
0:30density? What about the boiling point,
0:33melting point? No'no? Ayun and so on. So
0:36those are physical no properties. Ayan.
0:41Okay. Ayan. So dito example niya is
0:45melting metal no absorbs energy and
0:48undergo a physical change. No ayan. So
0:52nagbago yung metal from solid turning to
0:55liquid no? Sa yan sa forge na ginagawa
0:58diyan. Okay. So the chapter outline okay
1:03will discuss properties of a substance
1:06physical and chemical change.
1:09Learning to solve problem
1:13discuss this heat quantitative measure
1:16energy in chemical change and
1:18conservation of energy and energy in
1:21real world. No? Okay. Properties of
1:27substance.
1:29Each substance has a set of properties
1:32that are characteristics
1:36and it give it a unique identity. No
1:40property are classified as either
1:43physical or chemical. No. So pwede paang
1:46physical and chemical
1:49property. Kaiba yon. Ayun.
1:53Okay.
1:56Physical properties are inherent
1:58characteristics that can be determined
2:01without altering the composition. So
2:05okay
2:06so physical
2:09sabi dito inherent nasa sa kanya na no.
2:13Um and observing these properties won't
2:18change the very composition. Teka, may
2:21nag-chat sa akin guys. Wait lang ha.
2:26Allr. Okay. Ayan.
2:32Now, example, no.
2:35Okay. Uh yung mga physical properties,
2:38this can be observed using your basic
2:40senses.
2:42Example of physical properties are
2:45color, odor, taste, density,
2:51melting point, boiling point, state of
2:53matter and so on. are things that can be
2:58observed no physically okay
3:02without initiating a chemical reaction
3:04no ayun
3:10okay now what about chemical property
3:14chemical properties describe the ability
3:18of a substance to either undergo a
3:20reaction with another substance or to
3:24decompose.
3:26No? So yung chemical property naman daw
3:30no ah papaano siya mag react sa
3:33environment?
3:35Ah papaano siya mag-interact with other
3:39substance or compounds? No so yun yung
3:42chemical properties no?
3:46Okay
3:48yan. So example no chlorine
3:53physical properties no four times
3:56heavier than air
3:59a gas at room temperature green greenish
4:03yellow in color bad odor no yung
4:06chlorine
4:08in terms of chemical change chlorine can
4:10react with sodium
4:13forming
4:15sodium chloride
4:17No?
4:22Yan. Ito ah. Physical properties. No two
4:26substance have identical physical and
4:30chemical properties. So
4:34ano daw no sabi dito? Wala daw na pareho
4:37no ah magkaibang substance or compound
4:41they have their own physical and
4:44chemical properties. Okay?
4:48Ayun.
4:50Maing may
4:53slight no similarity but no 100%
4:57identical no. Ayan.
5:00Okay
5:02yan. So ito yung iba't ibang example. We
5:04have chlorine, water,
5:08sugar, acetic acid,
5:12nitrogen, dioxide,
5:14um oxygen. No, yan. Physical states,
5:19odor,
5:22color,
5:24melting point, boiling point.
5:31Okay ah.
5:33Sige nga.
5:35Okay. A physical and chemical change.
5:38Can you give me example of physical
5:41change?
5:44Sige nga.
5:52Example nga class, physical change.
5:56Okay. Ito pwede to. Ayan. Pag binago mo
5:59yung shape nung isang bagay no. Ayun you
6:02just change the shape.
6:06O yung size melting of an ice that's
6:09physical change. Boiling of water into
6:12steam that's physical change. 'Di ba?
6:16Ano pa?
6:18O chopping wood. Physical din yun no?
6:22Ayan breaking of glass yun. Physical din
6:24'yun no'no. So basically if it is
6:28physical change ano uh you just alter
6:33the physical properties but never change
6:36its composition. So without a change in
6:41composition. So hindi mo nabago yung
6:43identity n isang bagay.
6:47No new substance are formed during
6:50physical change. No itoung mga example.
6:55Alr, next tayo. What about chemical
6:59change? No, can you give me example of
7:02chemical change?
7:05Ayun. Okay. O na to. Rotting of banana.
7:10That's chemical change.
7:12Burning wood. Chemical change yan.
7:15Rusting.
7:17Chemical change. Digestion. O, correct
7:19to. Digestion is chemical change. Copper
7:24oxidation is chemical change.
7:28Ah photosynthesis yan. Correct to kasi
7:30metabolic yan eh. Color change. Ah yes.
7:34Oo pwede. Ah isa siya sa mga sign yung
7:38pagbabago nung kulay no na may
7:40nangyayaring chemical change. Souring of
7:43milk. Correct. Cooking an egg.
7:47Cheese you mean forming cheese ganon
7:49fermentation okay
7:52mixing vinegar and baking soda. Ah ano
7:55to? Okay. Neutralization no? May acid ka
7:58saka base. Ah root ripening. Sige. Ayan
8:02na nabanggit na. Okay na yan. So those
8:05are chemical change. Bakit chemical
8:07change? Kasi we are uh forming new
8:11substance or altering the composition
8:14no? Ganun siya. Basta 'ag napakailalaman
8:17natin 'yung composition, it's chemical
8:19change, 'no?
8:22Okay? Gan'n lang naman 'yung ano niya
8:23'yung ruling, 'no?
8:26Okay. Ayan.
8:28Ito mga example, no. By the way, class,
8:31if you see this symbol, yan, itoong
8:34symbol na to yung triangle may delta
8:37symbol. Okay. This represents heat in a
8:41chemical reaction.
8:43Okay.
8:47Okay. Common um physical and chemical
8:50change. Ito po yung mga example. Okay.
8:54So guys, you must be able to distinguish
8:56which one is physical and chemical
8:59change. This will be part of your exam
9:02no sa prelims.
9:05Okay? Yan po yung mga example.
9:09additional no common physical and
9:11chemical change. Ito po. Ayan.
9:15Okay. O sige nga.
9:18Let's practice no. Physical change. O
9:21which of the following is a physical
9:23change?
9:25Okay. Sinong una nagsagot ng a? Ayan.
9:29>> [sumisinghap]
9:30>> Okay. So
9:33ang pwede rito no? So itong B ah teka
9:37teka kuha ko ng red.
9:40Itong B hindi pwede kasi nag-form ka ng
9:43new substance no. Hindi na pwede to.
9:46Rusting. Nagbabago yung ano
9:49nangangalawang no. So hindi pwede
9:52acid base hindi pwede burning of sugar
9:56hindi pwede so only a is the correct
10:00answer no? Ayun
10:05oh. Sige next tayo. Ito o ayan chemical
10:09change
10:11o alin na? What's the answer? Letter E
10:15no. Ito Magsino Celesti. Ayan okay
10:21melting
10:24melting point lang yan eh. Breaking well
10:28fragile. So nahati lang no.
10:31Boiling
10:32hindi rin no. Putting sugar
10:36o in ice ah in tea no? Chemical change
10:40ba na bago ba 'yung sugar? Sugar pa rin
10:43'yun eh no. um na nasa tea no mag naging
10:47mixture lang sila okay now lighting a
10:52match no so nabago natin yung ah wood
10:56doun sa match no was charred no yan so
11:01ito yung pwede tingnan natin kung tama
11:03okay tama no yan lighting a match
11:08yan chemical equation okay write a
11:12chemical equation so ito po itsura niya
11:14no?
11:16Teka.
11:18Yan. Okay. Sige. Ah ano ang ibig sabihin
11:25nito? No yan ah. Madalas minsan nakaano
11:30'to naka-superscript.
11:32Okay. Ibig sabihin itong mga symbol na
11:34'to, ito yung kanilang
11:37face or
11:42state. Kung L, ibig sabihin siya ay
11:46liquid. Paano kung S? Ibig sabihin siya
11:50ay
11:52solid. Kung Gig sabihin siya ay
11:56gas. Paano kung nakalagay diyan ay AQ?
12:01Ibig sabihin siya ay
12:04aquus. Ibig sabihin um
12:07ano siya mixed no in in an aquous
12:11solution nasa water no. Ayan.
12:16Okay.
12:20Ayan. Now on this side anong tawag sa
12:24side na to bago yung arrow.
12:31starting substance
12:34we call them
12:37reactants.
12:40Correct no? Si Jillian Mercado at saka
12:43si ano Shelbik no. Ayan so we call them
12:46reactants. Ito what about itong side na
12:51to after the arrow. So we call them
12:54products.
12:56Yung symbol ng arrow it means it
12:59produces no pointing towards the
13:02product.
13:03Okay. A physical change usually a
13:05company accompanies a chemical change,
13:08no? Ayan.
13:12Okay.
13:16Okay. Learning to solve problem. Ito no.
13:21So pati pags-solve ng problem, no?
13:24[tawanan] Okay. So first you must read
13:26the problem carefully, no? Try to
13:28understand the problem.
13:30uh followed by planning. So you have to
13:33plan how you would solve it. Uh you you
13:36think of the working equation no and do
13:39the calculation then you have to check
13:41it no if it is correct. Okay yan
13:47energy. No um sa chemistry class. Okay.
13:53Ano bang ano ba yung energy no? Capacity
13:55of matter to do work. There are many
13:58types of energy. Mechanical,
14:01chemical and nuclear.
14:04Now, pag sinabing potential energy,
14:06these are energy that are stored, okay?
14:11Contained.
14:14Okay. The energy an object possessed due
14:17to its position or chemical property.
14:20Pwede rin no'an. So pinakita lang niya
14:23ito.
14:26Okay.
14:29Then kinetic energy no?
14:34Okay. Is energy that matter possess due
14:37to its motion.
14:39>> [tawanan]
14:40>> So based to its uh
14:43what it is uh doing no. Okay. So when a
14:47water held by a dam is released.
14:50Okay? So yung halimbawa meron kayong dam
14:53naktock pa yung water no dun sa wall.
14:56Ayan
14:58pag inopen natin yung ano um gates nung
15:01dam no. So iyung
15:04potential energy no mare-release no into
15:08kinetic energy no. Now the kinetic
15:11energy in a DM especially if there's
15:14turbine no ah it would produce
15:18electricity noun.
15:20So similar sa ano, similar sa
15:25windmills ' ba yung windmills ayan
15:30o ayan tapos may ano ka yan may windmill
15:32ka for example no so yung ah wind would
15:38go no dun sa sa
15:41LC no nung
15:43windmill
15:45so yung wind has kinetic energy Ayan,
15:50wind energy moving no? Ayan.
15:54So, maka-capture nung windmill. Yun yung
15:56yun iyung another no example of this
15:59yung sinasabi rito. Okay.
16:06Okay. Ayan. Same din sa ano, same din sa
16:08waterfalls, no? Ayan.
16:14Okay. So energy can be converted from
16:17one form to another. No, in chemistry
16:20energy is most frequently released as
16:24heat. Yun yung madalas na ipakita no? So
16:28kaya meron tayong um exothermic at saka
16:31endothermic reactions no. Ayan.
16:35So quant quantitative measurement no of
16:39heat. The SI unit for energy is joule.
16:43Okay. Energy required to change the
16:46temperature of 1 gr of water by 1°
16:50celsus is 4.18
16:53no J
16:56yan. And that is equal to 1 calory.
17:01No nutritional calories are actually in
17:05kilocal.
17:07So
17:10ayan.
17:12Okay. So magkaiba 'yung ano ha. Magkaiba
17:14rin yung small na word na calor with
17:18capital C na calor, no? Yan yung calcal.
17:24Teka nga. Is equal to yung capital
17:29no'no.
17:31Ayan cal. Tapos iba pa yung small letter
17:36ng cal. No? Ayan.
17:39Okay. So, uh how do we quantify energy
17:43no'? Um basically we use this units, no?
17:47Joule, cal.
17:50Okay. Yan.
17:56Ayan. Okay. Now, um, heat and
17:59temperature are different concepts. No,
18:03imagine two breakers containing water in
18:06each temperature is raised by 30°
18:10celsus.
18:12Okay. Breaker containing twice the water
18:15requires twice the heat, no? To reach
18:18the same temperature. Okay. Sige nga
18:21class. Ganito para mas ma-visualize ng
18:24maayos. So meron tayong ano ah pot. Ito
18:28metal pot. Isa t's isa pang metal pot.
18:34Yung laman nung first metal pot.
18:39Yan. Hanggang dito siya.
18:46Ah 100
18:49ml for example. No? Tapos ito naman
18:5750 lang. Ayan, small metal pot lang
19:00siya. 50 ml. Ayan. Okay. Ah, alin yung
19:05mas mabilis uminit? Is it A or B?
19:12Sige nga. Okay. Correct. Bakit B? No'no.
19:15Anong dahilan? Bakit B? Okay. Mas konti
19:18yung material that requires
19:23energy, no? Ayun. So, mas mabilis mo
19:26ma-erase yung kanyang temperature.
19:29Okay. Ayun. As compared doun sa nasa 100
19:34ml iyung A, no? Ayan. So sabi diyan,
19:38breaker containing twice the water
19:40requires requires twice the heat to
19:43reach the same temperature. No?
19:47Okay.
19:48Ayun. So ganun siya no?
19:56Okay. Sige nga. Ay ba't ganun? Nakaano
19:58na agad siya. Nakalabas na agad siya.
20:00Okay.
20:02So here is a sample problem no when
20:06methane okay which is a major compound
20:10in natural gas using the reaction below
20:13determine the amount of energy produced
20:17during combustion. So when methane is
20:19being combust no how many no produced?
20:25Okay so ito yung amount ng ano ng ah jou
20:32being produced. Yan.
20:35Okay. So ibig sabihin no energy is
20:38released kasi nasa side nasa side po
20:41siya ng product. Side ng product.
20:46Ito naman yung side ng
20:49reactance. Plus,
20:52what if no? Baliktad. What if ito
20:57nasa kabilang side? Kung ito release,
21:03what if nasa kabilang side siya? Ano
21:04yung kabaliktaran non?
21:09Sige nga try nga.
21:22Mm.
21:24Wala.
21:27Anong sagot niyo? What if kung nasa nasa
21:29kabila siya?
21:32Oh, review nga tayo. Ano kaya ang tawag
21:34niyo doon?
21:36Or how would you scribe it?
21:48Hello class.
21:51Hello. Hello. Hello.
21:59o kung ito release no so kung nasa
22:01kabila siya no ibig sabihin heat is
22:03being absorbed no yung energy ayun
22:10okay ngayon um
22:14okay dito pinapakita ano papaano
22:16na-convert
22:18ah yung kilojou into calories
22:22No? Sabi natin
22:25no ito kasi for every 1 kj you have
22:311000 jou. Yan. Ito yung first
22:34conversion factor that we use. Then
22:36another conversion factor for every one
22:39calorie you have point 4.184
22:44no jou. Yan. So you can see na
22:50okay yung units nila were
22:53canceled no? So similar yan dun sa first
22:56topic natin ' ba ah dimensional analysis
23:00sa measurement chapter 2. Ayan
23:03pinapakita diyan. Okay
23:09yan. Now specific heat no every
23:13substance has a characteristic
23:17heat capacity no so specific heat of a
23:21substance is the the amount of heat
23:25okay gained or lost required to change
23:27the temperature of 1 gram of mat of the
23:30material by 1° celsus no so specific
23:34heat of water no is higher than most
23:38substance ayan ito po iyung
23:40specific heat
23:42yan. So ibig sabihin ito yung kailangan
23:45nila na amount ng joues para mag plus ng
23:501 de celus.
23:54Sige nga. What if
23:56I have no?
23:58Okay, let's say
24:02okay, I have
24:0540
24:08joues. O, ilan kaya yung pwedeng maging
24:12dagdag na degree celsus?
24:15Let's say nasa ano lang naman nasa
24:181 gr lang naman ng water for example or
24:211 ml.
24:22Ilan kaya?
24:27Oh, try nga.
24:30Just an approximation. Okay lang.
24:39Wala.
24:52class ging pa.
25:03Okay. So
25:05sige nasa ayan around 10 no or malapit
25:10diyan
25:11no or 9 mga nasa ganon no. Ayan ito 9.56
25:17nasa ganyan no. Ayan. Okay. Given na ano
25:21lang ha na one 1 ml or 1 gram lang no ng
25:28tawag dito ng water no. So aangat siya
25:31ng temperatura no. Yan. So magkakaiba
25:34daw po yung specific heat
25:38no ng iba't ibang compound no. So for
25:40example sa water ito
25:43sa alcohol iba no so mas mabilis siyang
25:47ah
25:49uminit no mas konti lang yung kanyang
25:51ano kanyang um required na joues no ayan
25:57okay
26:04ayan specific heat capacity when an
26:08object is heated or cooled. The amount
26:11of energy transferred depends on three
26:15things. Number one is the amount of
26:17material. So mas marami
26:20ah mas mahirap painitin or palamigin.
26:26Okay. Magnitude of temperature change.
26:30Yan. The identity of material gaining or
26:33losing energy.
26:35Ayan. So ito yung formula.
26:40mass of substance times the specific
26:46heat of a substance
26:49times delta t or change in time so you
26:53can get the amount of heat
27:05using specific heat capacity
27:08Yan. So sabi dito, how much heat is
27:13needed no to raise the temperature of
27:16200 gr of water by 10° celsus?
27:22So yung formula kanina ito.
27:26Okay. So you have the mass 200 gr. Ito.
27:32Okay.
27:36Ayan. Tapos um
27:39delta t is okay 10° celsus and then the
27:43specific heat of water okay you have
27:474.184 184 jou over grams times degree
27:52celsus no so
27:54siya
27:56you would notice that the unit for grams
27:58would cancel with the specific heat then
28:02the temperature no
28:05okay degree celsus ito to magka-cancel
28:08din siya with
28:09specific heat so you would be left with
28:14unit of no Ah joule it too. Ayan.
28:20[sumisinghap]
28:21So pwedeng makuha iyung um
28:24amount of joule no? Okay. Or need heat
28:27needed no? Okay. To raise
28:31the 200 grams of water. Okay.
28:43Calculating specific heat capacity.
28:46Ayan.
28:50Okay. So,
28:54how do we rearrange this equation?
28:58So, ang pinapahanap sa atin ngayon is
29:01specific heat.
29:03So ang mangyayari class so yung specific
29:06heat mo
29:13se equ to okay yung katabi niya mass
29:18okay delta t is ano ha temperature okay
29:22change in temperature
29:24so you have here the mass would be
29:27placed as denominator
29:29and then delta
29:33Okay.
29:34And then sa taas you have heat no. Ito
29:38po yun yung pinapakita rito. Yan.
29:45Okay. So itong part na to, this
29:49numerator is heat.
29:52Dito yung mass. Then this one is the
29:58delta T. No? Ayan.
30:01Okay.
30:05So, ni-rearrange lang po 'yan.
30:13So energy in chemical change. All
30:15chemical reactions either absorb or
30:19release energy. So pwede pa lang ang
30:21isang chemical reaction ay mag absorb or
30:25magrelease ng energy. Chemical change
30:29can produce different kinds of energy.
30:32No so some chemical reactions can
30:34produce electrical energy.
30:38Example of that is
30:40battery. Yan. So yung baterya po is
30:45inside it. It's a chemical reaction no
30:49pwede ring heat
30:52or even uh light.
30:55Okay? Example ng nagpo-produce ng light
30:58is yung let's say you burned no a
31:01material no. So through combustion
31:05yan. So pwede 'yun 'no? Okay.
31:12Chemical change can also use energy
31:15no' such as electricity no used to
31:19decompose water.
31:21So pwede kang mag-input no nger chemical
31:25change no. Ayan. So iyung water
31:30if you have electricity no
31:35so um iinit iyun ano tapos it would
31:39separate
31:41no the hydrogen from the oxygen hence
31:45decomposition no [sumisinghap]
31:47okay or solar energy used by plants to
31:51power the photosynthesis no ayan so
31:54pwede mong applyan ng energy yung isang
31:56chem chemical change. Okay.
32:02Conservation of energy. No, energy can
32:05be changed from one form to another but
32:08no, they can never be created or
32:12destroyed no.
32:15So binabago lang pala natin yung form
32:17niya no. Yan. So sabi dito
32:22no,
32:23neither created nor destroyed. So iyung
32:27amount ng energy sa universe is fix,
32:32no? So we just transfer it from one form
32:35to another.
32:38Familyar ba kayo dito class sa lo na to?
32:45Sinong hindi familiar? [tawanan]
32:47Pamiliar po? Pa-thumbs up naman kung
32:48familiar. Sige na 'yan. Okay. So madalas
32:53uh saan nyo ba na-encounter 'to? Siguro
32:55sa physics 'no? Especially sa physics 2
32:59yan kasi may mga el-electricity na no.
33:01Okay. Ayan.
33:05So ayan ung sabi. So applicable din pala
33:06'to no sa chem no? Ayan kasi may mga
33:10involvement din ng energy. Okay.
33:16Ayan. So yan pinapakita. Okay.
33:20So
33:22when water decompose
33:25no energy is absorbed by the system no
33:29so
33:31H2 and O2
33:34have higher energy potential. So ito daw
33:37yung water daw no you would see mababa
33:40yung kanyang energy potential.
33:44Pag nag-separate sila, okay, you would
33:48see na yung dalawang byproduct no
33:49through the composition would have
33:52higher energy, no?
33:55Okay. So, energy is being in this case,
33:59energy is absorb.
34:02Kasi you start with low, you end with
34:06high energy. Paano kung 'yung nag-start
34:09ka sa high energy no' na state and you
34:13end up with low
34:16energy? So ibig sabihin dito energy is
34:19being
34:21rease.
34:23Okay?
34:25Ayun. Okay po. Tama po no. Ayan si Miss
34:29Venice no Punsalan. Ayan. So energy is
34:32released.
34:34Okay.
34:36Ayan. So
34:39energy in the real world, no? Energy
34:42comes from many source including
34:44petroleum, coal, uh wood no all derived
34:50from the sun, no? So
34:53uh we use petroleum deposits, no?
34:56Gasoline at saka natural gas.
34:59Okay. Bukod sa mga to meron pa bang
35:02ibang source ng energy no? Nowadays in
35:05the Philippines
35:07ah they wanted to open yung tinatawag na
35:10ano yung Bataan
35:15ah nuclear no? May mga talks about it
35:18eh. Power
35:24plant.
35:26Class narinig niyo na ba to? Bataan
35:28nuclear power plant.
35:32Napuntahan niyo na ba yan?
35:35O
35:39facility no if I'm not mistaken was
35:42uh
35:44developed no during the time of ano pa
35:48ah President Marcos
35:51Senr. No? Yung father.
35:54Okay. Uh in hopes na ito no could could
35:59power no the whole country no. Ayan kasi
36:05magandang source no or uh nuclear power
36:08plant can produce no high amount of
36:11energy. Yun yun nga lang ah may
36:16kailangan lang ng waste no management
36:19nito no na
36:22ano um extensive no.
36:26Okay. Ano pang meron no? Have you been
36:28to Pililia plus? You know Pelilya Rizal.
36:32Tama ba, Rizal ba? Tama. Pililya.
36:36You know what's in there no? Meron
36:38silang ano tawag dito. Ano bang ano
36:42ginagawa doon class?
36:46Meron silang windmills no? Have you been
36:49to Ilocos sa may bandang ano um
36:53pagodp ba? [tawanan] Sorry hindi ko
36:56kabisado ha. So have you been to Ilocos
36:58' ba meron din silang ano doon windmills
37:00no so those are ano power plants or
37:04facilities that can harness the energy
37:08no in this world okay yan so ito no
37:12hydrocarbon ayan so ito they can be used
37:16as fuel itong mga to
37:21okayan so natural gas methane
37:25Yan. So meron pa tayo ethane, propane,
37:28butane. Saan niyo nakakita ong mga names
37:31na to? No, so sa mga ano sa bahay ' ba
37:34you have your gas tank. Ayan.
37:38So those are no those have natural gases
37:42no. Yan mga LPG no kung tawagin
37:48yan. coal is formed from plant remains
37:51stored under high pressure for many
37:53years. So ito 'yung mga coal naman 'no
37:55from uh prehistoric no um plants
38:01no'no. 'Yun na nakokolekta natin
38:04nowadays.
38:07Uh the higher the carbon content, the
38:09more energy available in the coal. No'no
38:12'yan. Other energy source 'yan pa 'o. So
38:14wind, solar, biomass, no'no? Nowadays
38:18'yung mga bahay no, they are placing
38:23solar 'di ba?
38:25Okay. Nakapag nakakita na ba kayo ng mga
38:28bahay na may solar? T
38:33O
38:35ah. Ito 'yung nagiging nagiging ano 'no
38:37pansinin niyo. Ito 'yung nagiging uh
38:39trend or nagiging respond ng mga
38:43uh countrymen natin ano ng mga neighbor
38:47natin. Bakit no'no? With the high cost
38:51no of electricity in the Philippines.
38:54Masyado kasing mahal ang kuryente natin
38:56no sa Pilipinas.
38:58Ah in fact isa tayo sa pinakamahal
39:03sa ano sa Southeast Asia.
39:07Imagine kuryente natin para tayong ano
39:10mas if tama ba yung narinig ko sa news
39:13mas mahal pa tayo sa Singapore no sa
39:17kuryente. Ayun
39:21no. So
39:23um maybe no it's about time mag-build pa
39:26tayo ng marami pang ano facilities how
39:29to harness energy, no? Ayan.
39:34Okay. So that's the end of this uh
39:38chapter. No. Do you have questions so
39:40far? Ito po yung mga na-discuss natin.
39:42Properties, physical and chemical
39:44change,
39:46energy,
39:48heat and energy in the real world. Do
39:52you have question so far? May tanong.
39:56Okay.
39:57Kayo nga class. Um
40:01if you would be
40:03a what you call this? Policy maker or
40:07law maker, how would you improve our
40:10energy? Sige nga do tayo sa ano sa
40:13societal
40:15issues. Sige nga.
40:23Sige, pwede ka magsulat diyan sa chat ng
40:25proposal mo.
40:27O
40:31ah sige that I agree. Oo first you must
40:35ensure that there's good governance no?
40:38Ayun sige. Okay. Pero how would you?
40:43Sige nga.
40:44Sa bagay no good governance kasi it
40:46would be hard for us to build projects
40:49efficient projects no without good
40:51governance. Yeah. Okay.
40:55Mahirap nga naman kasi ba you would fund
40:58something then you know the delivery
41:02it's
41:04inefficient no lalabas. Okay. Anyway,
41:08class, uh, no more questions. Wala na.
41:14Wala ng tanong.
41:17Okay.
41:21[tawanan]
41:22Tax braks na no? Ah, okay to. Yeah, I
41:25agree with this. Pwede 'to 'no? Offering
41:28tax brakes po to lower tax to businesses
41:31and local homes that use solar solar
41:35panels. O, tama'to. Pwede 'to no? Kasi
41:38ah incentivize mo sila 'di ba? Oo nga
41:41no.
41:43Mm. O kaya ano you you offer government
41:47loans ' ba yung lower low cost low
41:51interest no na loans ah designed for
41:55them to have no solar panels no
41:59or makipag-partner yung government with
42:01a
42:03installer no ng ganon pwede yung mga
42:06ganun no ayun
42:09okay
42:11So
42:13energy is free no roaming no in our
42:17planet. We just need to make way on how
42:21to harness it. No yan ako actually
42:24nagdi-diy ako guys ng ah
42:28ganyan no.
42:31Okay.

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