HC Verma - Concepts of Physics Part 2

Book: HC Verma - Concepts of Physics Part 2

Chapter: 27. Specific Heat Capacities of Gases

Subject: Physics - Class 12th

Q. No. 2 of Objective II

Listen NCERT Audio Books - Kitabein Ab Bolengi

2

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an isothermal process.

In an isothermal process, the temperature remains constant. The internal energy of an ideal gas is a state function that depends on temperature. Hence, change in internal energy is zero and from the first law of thermodynamics: ΔU = Q - W, where ΔU = change in internal energy, Q = amount of heat given and W = work done by it.


Since ΔU = 0 in this case, we get Q = W.


Options (a) and (b) are incorrect because we actually provide a finite amount of heat to the system, and hence work is also not zero.


Option (c) is incorrect because we just showed that Q = W.


Hence, the correct option is option (d).

Chapter Exercises

Short Answer
Objective I
Objective II
Exercises

More Exercise Questions

1

A gas kept in a container of finite conductivity is suddenly compressed. The process
2

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an isothermal process.
3

Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process.
4

Consider the processes A and B shown in figure. It is possible that
5

Three identical adiabatic containers A, B and C contain helium, neon and oxygen respectively at equal pressure. The gases are pushed to half their original volumes.
6

A rigid container of negligible heat capacity contains one mole of an ideal gas. The temperature of the gas increases by 1°C it 3.0 cal of heat is added to it. The gas may be
7

Four cylinders contain equal number of moles of argon, hydrogen, nitrogen and carbon dioxide at the same temperature. The energy is minimum in

Students Store