The value of the ratio `C_(P)//C_(V)` for hydrogen is `1.67 at 300K` but decreases to `1.4 at 300k` as more degrees of freedom become active. During this rise in temperature (assume `H_(2)` is ideal gas).

Options

A. `C_(P)` remains constant but `C_(V)` increases
B. `C_(P)` decreases but `C_(V)` increases
C. Both `C_(P)` and `C_(V)` decrease by the same amount
D. Both `C_(P)` and `C_(V)` increase by the same amount

Answer

D