Entropy Change For Melting Ice, Heating Water, Mixtures & Carnot Cycle of Heat Engines - Physics

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This physics video tutorial explains how to calculate the entropy change of melting ice at a constant temperature of 0C using the latent heat of fusion of ice. It explains how to calculate the entropy change of heating water from 0C to 100C using two different formulas. The entropy change equals the heat transferred divided by the temperature in kelvin. You can also calculate using a formula with natural logs. It also explains how to calculate the entropy of a mixture such as mixing hot water with cold water. Finally, it discusses the entropy change of the carnot cycle of a typical heat engine and how to calculate it. This thermodynamics video contain many practice problems.
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Опубликовано:

14 окт 2024

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Комментарии : 58

@TheOrganicChemistryTutor 8 месяцев назад

Final Exams and Video Playlists: www.video-tutor.net/

@leenmuslem5109 2 года назад

I just wanna say that paying my university fees is losing money. I am passing the exam by your explanation. In reality, I see all the students in the uni watching you before any exam. THANK YOU and keep on

@aepmatters 2 года назад

Totally agree

@ratnakhadka8938 2 года назад

extremly agree

@giocoso4576 6 месяцев назад

nah you pay for the degree not for the knowledge

@gianlucacastro5281 3 года назад

I have yet to study something without ending up watching your videos, they are just too easy to understand

@Ben-xe5dr 11 месяцев назад

Thank you so much for this, you're the reason I haven't failed college yet

@katelyn69232 11 месяцев назад

So real

@smaqib7577 3 года назад

you are amazing and a life saver

@teeheecows 4 года назад

5:52, i think you mean the *final* temp is 50 not avg. I could be wrong, but you referred to it as final temp and you proceeded to find the actual avg temps later in your work.

@Gajalo Год назад

To find final temp. he find average temperature or you can say mean.. I think if I'm not wrong

@samjuri 4 года назад

what a legend

@Vlogzone786 6 лет назад

Really nice ...im satisfied

@ryan_uwu 2 года назад

For the mixture problem would the process of finding final temperature be different if the mass of the two objects were different?

@wamrikhotso 4 месяца назад

The elementary mercury, Hg, is a silvery liquid atom at room temperature. The normal freezing point of mercury is -36.9 ºC, and its molar enthalpy of fusion is ∆Hfus = 2.29 kJ/mol. What is the entropy change (∆S ) of the system when 50.0 g of Hg (l) freezes at the normal freezing point?

@אוהבתורהומדע Год назад

Thank you very much for the content

@إحساسفيزيائية 5 лет назад

I love you r channel

@r.i.p.volodya Год назад

Thank you for that 😁

@eltonl.7754 7 месяцев назад

at 11:00 and forward, you used 4184 for your heat capacity yet the units are J/Kg*C. How are you able to use 4184 in the equation that has the temperatures in Kelvin?

@dr.lennartlichtenstein4298 Год назад

U r pass next failur student in my class

@sennugatobiloba3251 3 года назад

Thank you so much I’ve learnt a lot so far on this channel and this is the first time I’m typing a comment. I was taught to convert my shc to 4.184 Buh you never did. Why?

@nahomsisay1026 3 года назад

Keep it up brother...

@asseelessam5809 5 месяцев назад

In the second question, the 2nd way to solve , you don’t convert the specific heat unit from celsius to kelvin ?? Why you use the same value 4184 j/kgc ??

@reinholdkattiamushelelo4975 5 лет назад

Hi guys, how do I post a question to this amazing organic chemistry tutor?

@AlvinGuoSubscribe 4 года назад

Reinhold Katti Amushelelo ask kindly

@mahdiimamnasif4811 Год назад

thank u sir!

@LovinBabu 3 года назад

Very useful!

@aepmatters 2 года назад

Yes it’s

@fishfish1051 2 года назад

Thank you so muchhhhhhhhhhhhhhhh !

@kininagothu2526 3 года назад

at 2:17 we were taught to take moles, not mass. I have been doing it such. Someone help out in which is right?

@jackpayne5237 3 года назад

both are correct just depends on the information given and what you do with it

@animesharts8806 3 года назад

You can take moles if the heat capacity is molar. If specific heat capacity is given, you take mass.

@marshmallows5857 2 года назад

idol kita

@aravasacz421 2 года назад

Amazing ! THANK YOU!

@UsherHappy Год назад

i have a quesion if given condition is P = 1.5atm , T = 373K then can we calculate entropy of air?..

@7Andymufc 3 года назад

whats the difference between latent heat of fusion and entalpy h?

@samhoang8753 3 года назад

Latent heat of fusion is the heat required for a substance to change from a solid to liquid (and vice versa). Enthalpy just means the content of heat and work a substance have.

@aliciaruvalcaba2343 3 года назад

Did he say what the final T was for problem 3?

@morganyendama5065 5 лет назад

How are you getting the 50

@jithinajith4295 Год назад

Which textbook is this?

@nekomari3519 3 года назад

DeltaS= (Q/T avg) + (Q/T avg) Is this formula applicable only for water/water mixture? What about metal in water?

@tarehjernetarehjerne4082 3 года назад

Depends on the accuracy you are aiming for. dissolved metals increase the entropy, so you would have to take that into consideration too. (chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_Chem1_(Lower)/08%3A_Solutions/8.02%3A_Thermodynamics_of_Solutions) The formula works on most liquids, within some degree of accuracy.

@tytbeats319 9 месяцев назад

Let's go to the alps

@giftedsimon6844 Год назад

❤❤

@tharunk3451 4 года назад

Great

@amberjaramillo4525 6 лет назад

why does this sound like mark wahlberg

@tu_nonna_emiliana 3 года назад

i don't think i am going to make in an hour so i'm jus going to leave a comment right here

@dogkiller228 2 года назад

krasavchik

@dr.lennartlichtenstein4298 Год назад

Pass

@azieraazram5279 Год назад

was it the formula to find final temperature of mixture should be (m1xT1) + (m2xT2) / m1+m2

@dr.lennartlichtenstein4298 Год назад

@@azieraazram5279 15:00 discuss ur point with ur friend in Totural n try to confess him, wut i care about my brilliant students is to use the tequniqes basic n advance of science especially teqniques of research about specific subject between million of books in science library is he or she got wrong result no problem the J E W enistein made wrong theory all today world play by radioactive elemnts as sand, n me n bohr suffer from it, if u desturb my chairman office again especially during my break time busy with ur professors the German femals doctors in my office break time, i will charge u to buy my breakfast next day punishment varies to cleaning ur lectureroom & buying me juice or markers So do not knock door of Prof.Dr. Lennart office cuz he is always firing, i am busy with my life project (The starship) while my speciality is far away from physics but i used to play this Science game since i made my baby underwear dirty

@dr.lennartlichtenstein4298 Год назад

@@azieraazram5279 I am not American professors I am German scientist i care about the core, American students r artist of cheating they read for exam once they award the degree stop reading, n the college accept any 1 who can afford this why no new services or real product since ww2