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 Objective I

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4

Let CV and CP denote the molar heat capacities of an ideal gas at constant volume and constant pressure respectively. Which of the following is a universal constant?

For an ideal gas, Cp - Cv = R.


Here, R is the universal gas constant.


Hence, the correct option is (c).


Option (a) is incorrect since Cp/Cv = , which differs for monoatomic, diatomic or polyatomic gases. Here = ratio of molar heat capacities at constant pressure and constant volume.


Option (b) is incorrect since CpCv = Cv2, which is not a constant as varies.


Option (d) is incorrect since Cp + Cv = (+1)Cv, which is not a constant as varies.

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