Question

# If the distance between the atoms of a diatomic gas remains constant. Its specific heat capacity at constant volume per gram-mole is

A
52R
B
23R
C
R
D
R3

Solution

## The correct option is A 52RAs distance between the atoms of a diatomic gas remains constant, vibrational degree of freedom will not be counted. ∴ It possesses only translational and rotational degree of freedom. ⇒f=3(translational)+2(rotational)=5 Since, specific heat at constant volume per gram-mole is molar specific heat at constant volume. ⇒CV=(f2)R ∴CV=52R

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