Kinetic Theory Of Gases Question 98

Question: The molar specific heat at constant pressure of an ideal gas is (9/2)R. The ratio of specific heat at constant pressure to that at constant volume is

Options:

A) 1.58

B) 1.82

C) 1.28

D) 1.44

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $ C _{p}=( \frac{f}{2}+1 )R=\frac{9}{2}R $
$ \Rightarrow f=7 $

$ \frac{C _{p}}{C _{v}}=1+\frac{2}{f}=1+\frac{2}{7}=1.28 $