JEE Main On 8 April 2017 Question 27

Question: An ideal gas has molecules with 5 degrees of freedom. The ratio of specific heats at constant pressure $ (C _{P}) $ and at constant volume $ (C _{V}) $ is [JEE Online 08-04-2017]

Options:

A) $ \frac{7}{5} $

B) 6

C) $ \frac{7}{2} $

D) $ \frac{5}{2} $

Show Answer

Answer:

Correct Answer: A

Solution:

  • $ f=\frac{C _{P}}{C _{a}}=1+\frac{2}{1} $ $ =7/5 $