# Physics Questions and Answers – Kinetic Theory – Specific Heat Capacity

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This set of Physics Multiple Choice Questions & Answers (MCQs) focuses on “Kinetic Theory – Specific Heat Capacity”.

1. How many degrees of freedom are there in a monatomic gas?
a) 1
b) 2
c) 3
d) 0

Explanation: A monatomic gas has 3 translational degrees of freedom.

2. What is the ratio of specific heats for a monatomic gas?
a) 5/3
b) 5/2
c) 7/5
d) 9/5

Explanation: The value of Cv for a monatomic gas is 3/2 R and
CP is 5/2 R.
Thus the value of γ is:
CP/CV= 5/3.

3. How many degrees of freedom are there in a diatomic gas?
a) 2
b) 5
c) 3
d) 1

Explanation: A diatomic gas has 3 translational degrees of freedom and 2 rotational degrees of freedom. Thus, the total number of degrees of freedom is 5.
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4. What is the ratio of specific heats for a diatomic gas?
a) 7/5
b) 5/3
c) 9/7
d) 7/2

Explanation: The value of CV for a diatomic gas is 7/2 R and
CP is 9/2 R.
Thus the value of γ is:
CP/CV = 7/5.

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