Question

C$_v$ and C$_p$ denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then,

• A. $C_p$ - $C_v$ is larger for a diatomic ideal gas than for a monoatomic ideal gas
• B. $C_p$ + $C_v$ is larger for a diatomic ideal gas than for a monoatomic ideal gas
• C. $\frac{C_p}{C_v}$is larger for a diatomic ideal gas than for a monoatomic ideal gas
• D. $C_p$. $C_v$ is larger for a diatomic ideal gas than for a monoatomic ideal gas

Answer 1

Answer: (B), (D)

For monoatomic gas, $C_p =\frac{5}{2}R$ and $ C_v =\frac{3}{2}R$
For diatomic gas, $C_p=\frac{7}{2}R$ and $ C_v=\frac{5}{2}R$