Question

The value of the ratio $\frac{C_p}{C_v}$ for $H_2$ is 1.67 at 30k but decreases to 1.4 at 300K as more degrees of freedom become active. During this rise in temperature,

• A. $C_p$ remains constant but $C_v$ increases
• B. $C_p$ decreases but $C_v$ increases
• C. Both $C_p$ and $C_v$ decreases by the same amount
• D. Both $C_p$ and $C_v$ increases by the same amount

Answer 1

The correct option is D Both $C_p$ and $C_v$ increases by the same amount

When $\Delta$of increases, more heat required to raise the temperature as the heat has to be distributed to new $\Delta$ofs.