Q 11-11-123JEE MainJEE Main 2021 (20 Jul, Shift 1)Easy
The amount of heat needed to raise the temperature of 4 moles of a rigid diatomic gas from 0 °C to 50 °C when no work is done is ______ ($R$ is the universal gas constant)
Answer: (D) 500R
No work means constant volume. For a rigid diatomic gas $C_V = \frac52R$: $Q = nC_V\Delta T = 4\times\frac52R\times50 = 500R$.
Solution by Sreeraj P, M.Sc Physics