Question

One mole of ideal monoatomic gas $(\gamma = 5/3)$ is mixed with one mole of diatomic gas $(\gamma = 7/5)$. What is $\gamma$ for the mixture? $\gamma$ Denotes the ratio of specific heat at constant pressure, to that at constant volume.

• A. 44622
• B. 23/15
• C. 35/23
• D. 44654

Answer 1

Answer: (A)

44622

Answer 2

$Q = Q_{1} + Q_{2}$ $\frac{n_{1}+n_{2}}{\gamma_{m}-1} = \frac{n_{1}}{\gamma_{1}-1}+\frac{n_{2}}{\gamma _{2}-1}$ $\gamma_{m} = \frac{3}{2}$