Question

Equal volumes of monoatomic and diatomic gases of same initial temperature and pressure and mixed. The ratio of their specific heats of the mixture $\left(\frac{C_p}{C_v}\right)$ will be

• A. 1
• B. 1.5
• C. 1.52
• D. 1.53

Answer 1

Answer: (B)

1.5

Since they have same volume hence they have the number of moles =n

$C_v=\frac{n\times 3R/2+n\times 5R/2}{n+n}=2R$

$C_p=C_v+R=3R$

$\frac{C_p}{C_v}=\frac{3R}{2R}=1.5$