Numerical Problems Chapter 10 Thermodynamics l First Year Physics Federal Board KPK Syllabus

Water at 20oC falls from a height of 854 meters. If the whole energy is used in increasing the temperature, find out the final temperature. Specific heat of water is 4200JK-1kg-1
25200J of heat is supplied to the system while the system does 6000J of work. Calculate the change in internal energy of the system.
A sample of ideal gas is uniformly heated at constant pressure. If the amount of 180J of heat is supplied to the gas, calculate the change in internal energy of the gas and work done by the gas. Take γ=1.41
Find the efficiency of a Carnot’s heat engine working between the steam and ice points?
A Carnot heat engine absorbs 2000J of heat from the source of heat engine at 227oC and rejects 1200J of heat during each cycle to sink. Calculate efficiency of engine temperature of sink and amount of work done during each cycle.
What is the least amount of work that must be performed to freeze one gram of water at 0oC by means of refrigerator? Take the temperature of the surrounding as 37oC. How much heat is passed on to the surrounding during this process?
Calculate the change in entropy when 10kg of water is heated from 90oC to 100oC? (Specific heat of water is 4180 Jmole-1K-1.
A system absorbs 1176J of heat and at the same time does 352.8J of external work. Find the change in internal energy of the system? Find the change in internal energy in the system when it absorbs 1050J of heat while
84J of work is done? What will be the change in internal energy of the gas if 210J of heat is removed at constant volume?
An ideal gas at 20.0oC and a pressure of 1.50×105 Pa is in a container having a volume of 1.00L. (a) Determine the number of moles of gas in the container. (b) The gas pushes against a piston, expanding to twice its original volume, while the pressure falls to atmosphere pressure. Find the final temperature.
A block of ice at 273K is put in thermal contact with a container of steam at 373K, converting 25.0g of ice to water at 273K while condensing some of the steam to water at 373K. (a) Find the change in entropy of the ice. (b) Find the change in entropy of the steam. (c) Find the change in entropy of the Universe.

[ur.cristianochannel]

🥰🥰🥰🥰🥰🥰🥰 good ho ga gg . SIR I WISH U ARE GOOD TEACHER IN PAKISTAN AND SUCCESS IN LIFE

[ridafatima]

Thanks 😊 bohat bohat dil se shukria☺☺☺

[Rehmanali-rzeb]

Thank you so much sir
Commendable teachings skills ❤❤❤
May Allah give you more success

[AbdulHadi-bqju]

19:01.... Answer of "n" is "61.60" by calculator but in book it is "6.16×10^-2".

[ARSHADKHAN-hdfl]

Monday ko paper hai sir or Abe ap k vedio deky hai or Dil kush hogaya

[laraibnoor]

In numerical 5 we can also find work by this formula (w=Q1 -Q2)

[MuhammadYousaf-ehcr]

May Allah Bless You. It's your students Dua. Ameen!🥰

[ARSHADKHAN-hdfl]

sir you are wonderful l wish you will become a grate youtuber

[hafizzahid]

Salam,
Sir your efforts are highly appreciable. Kindly make correction in numerical no. 9
I L=0.001 cubic metre
Then we get correct answers, thanks

[qismatqismat]

THANK YOU SIR because you explain it very easy

[TariqZaman-to]

It's very helpful for us jazakallah

[LaibaIqbal]

Thank you so much sir... It was too helpful and easy❤️

[SakhiZaman-zw]

12:37 ) Sir app Lf put kar rahy Hai but reason Nahi de no.#06 mai

[pakdubaitraveltourism]

In Numerical : 6;

A mistake went un Noticted by everyone.

Sir write E(H) = Q2 / (Q1-Q2). This is wrong. This formula is for E(Cooling) not E(Heating). In this numerical water is to be cooled so E(Cooling) will be used.

Anyways great explanation!

[eeshakhan]

Sir 5th numerical me jo temperature find krne wala hai usme jab T2/T1 dosri side pe jaye ga you reciprocal nahi ho jaye ga ???

[BushraKhan-ukxi]

Plz sir Jo data a usy b Pura smjaya krin k kia ceez kis k equal a or wo ceez question mn kis name sy a

[ManhwaExplaineer]

Sir hama Lf khud yaad karna parha ga
ya paper ma hint denga?

[shahzaibhussain]

I have completed full 1st year physics course from your licture

[HuzaifAli]

Assalam o alikum. Sir what is Lf in this numerical 11:11?

[sairayasmeen]

Sir numarical no. 5 ma efficiency ki value 40 % ha or ap na 0.4 put kar ka T 2 ki value nikali ha sir please is ka bata dan kyne ky 40 put kar ky ans ni a raha