MolSynapsequestion bank

MolSynapse / Question bank / Thermodynamics and Thermochemistry / Heat capacities and their relations

NEET levelSingle correct optionDifficulty 1 of 3td021

At ordinary temperatures, where vibrations are not excited, the molar heat capacity at constant volume of a diatomic ideal gas is

A $\frac{3}{2} R$
B $\frac{7}{2} R$
C $\frac{5}{2} R$
D $\frac{9}{2} R$

Answer: C

Three translational and two rotational degrees of freedom each contribute

\frac{1}{2} R

, giving

C_{V} = \frac{5}{2} R

.

Practice Thermodynamics and Thermochemistry More on Heat capacities and their relations

Previous questionNext question

More questions on Heat capacities and their relations