1. Fill in the blanks Name of gas - Monoatomic, Diatomic rigid Degrees of freedom - 3, ......

Question

1. Fill in the blanks

Name of gas	Degrees of freedom	Internal energy	CV	CP	?
Monoatomic	3	......	\(\frac{3}{2}R\)	......	.....
Diatomic rigid	.......	\(\frac{5}{2} RT\)	.......	\(\frac{7}{2}R\)	........

 2. What happens to the value of ratio of specific heat capacity, if we consider all rotational degrees of freedom of a 1-mole diatomic molecule?

Answer 1

1. 

Name of gas	Degrees of freedom	Internal energy	CV	CP	?
Monoatomic	3	\(\frac{3}{2}RT\)	\(\frac{3}{2}R\)	\(\frac{5}{2} R\)	\(\frac{5}{2} \)
Diatomic rigid	6	\(\frac{5}{2} RT\)	\(\frac{5}{2} R\)	\(\frac{7}{2}R\)	\(\frac{7}{2}\)

2. Total degrees of freedom = 3 (trans) + 3 (Rot) = 6

∴ C_V = 3R, C_P = 4R

Ratio of specific heat γ = \(\frac{4}{3}\)

Ratio of specific heat capacity decreases.