Question

For a diatomic gas change in internal energy for unit change in temperature for constant pressure and constant volume is $U_{1}$ and $U_{2}$ respectively. $U_{1}:U_{2}$ is

• A. 5 : 3
• B. 3 : 5
• C. 1 : 1
• D. 5 : 7

Answer 1

Answer: (C)

1 : 1

Answer 2

The temperature rises by the same amount in the two cases and the internal energy of an ideal gas depends only on it’s temperature.

Hence $\frac{U_{1}}{U_{2}} = \frac{1}{1}$