Q 11-11-106JEE MainJEE Main 2022 (26 Jul, Shift 1)Easy
$7$ moles of a certain monoatomic ideal gas undergo a temperature increase of $40\ \text{K}$ at constant pressure. The increase in the internal energy of the gas in this process is (Given $R = 8.3\ \text{J K}^{-1}\text{mol}^{-1}$)
Answer: (B) $3486\ \text{J}$
$\Delta U = nC_V\Delta T$ whatever the process:
$$\Delta U = 7\times\frac32\times8.3\times40 = 3486\ \text{J}$$
Solution by Sreeraj P, M.Sc Physics