Q 11-11-159JEE MainJEE Main 2019 (12 Apr, Shift 2)Easy
A diatomic gas with rigid molecules does $10$ J of work when expanded at constant pressure. What would be the heat energy absorbed by the gas, in this process?
Answer: (B) $35$ J
At constant pressure $W = nR\Delta T$ and $Q = nC_P\Delta T = \dfrac72nR\Delta T$.
$$Q = \frac72\times10 = 35\ \text{J}$$
Solution by Sreeraj P, M.Sc Physics