Q 11-11-041JEE MainJEE Main 2026 (2 Apr, Shift 1)Easy
Heat is supplied to a diatomic gas at constant pressure. Then the ratio of $\Delta Q:\Delta U:\Delta W$ is ______.
Answer: (D) $7:5:2$
At constant pressure: $\Delta Q=nC_p\Delta T$, $\Delta U=nC_v\Delta T$, $\Delta W=nR\Delta T$.
For a diatomic gas $C_v=\tfrac52R$ and $C_p=\tfrac72R$.
$$\Delta Q:\Delta U:\Delta W=\tfrac72:\tfrac52:1=7:5:2$$
Solution by Sreeraj P, M.Sc Physics