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. 4 of Short Answer

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4

Does a solid also have two kinds of molar heat capacities CP and CV? If yes, do we have CP > CV? Is CP – CV = R?

Yes, a solid also has two kinds of molar heat capacities, Cp(at constant pressure) and Cv(at constant volume).


Solids are almost incompressible.


Hence, the values of Cp and Cv are such that Cp > Cv, but they are almost equal since the dependence on heat capacities is very less in the case of solids.


Since the values of Cp and Cv are not that different, Cp - Cv is much less than R.


1

Chapter Exercises

Short Answer
Objective I
Objective II
Exercises

More Exercise Questions

1

Does gas have just two specific heat capacities or more than two? Is the number of specific heat capacities of a gas countable?
2

Can we define specific heat capacity at constant temperature?
3

Can we define specific heat capacity for an adiabatic process?
4

Does a solid also have two kinds of molar heat capacities CP and CV? If yes, do we have CP > CV? Is CP – CV = R?
5

In a real gas the internal energy depends on temperature and also on volume. The energy increases when the gas expands isothermally. Looking into the derivation of CP – CV = R, find whether CP – Cv will be more than R, less than R or equal to R for a real gas.
6

Can a process on an ideal gas be both adiabatic and isothermal?
7

Show that the slope of p –V diagram is greater for an adiabatic process as compared to an isothermal process.
8

Is a slow process always isothermal? Is a quick process always adiabatic?
9

Can two states of an ideal gas be connected by an isothermal process as well as an adiabatic process?
10

The ratio CP/CV for gas is 1.29. What is the degree of freedom of the molecules of this gas?