Kinetic Theory Of Gases Question 85

Question: When an ideal diatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is

Options:

A) 2/5

B) 3/5

C) 3/7

D) 5/7

Show Answer

Answer:

Correct Answer: D

Solution:

[d] $ \Delta Q=nC _{p}\Delta T $ at constant pressure $ \Delta U=nC _{v}\Delta T $ Fraction $ =\frac{\Delta U}{\Delta Q}=\frac{C _{V}}{C _{p}}=\frac{1}{\gamma }=\frac{5}{7} $ for diatomic gas.