JEE Advanced 2023 Paper 1 Solutions

A closed container contains a homogeneous mixture of two moles of an ideal monatomic gas (γ=5∕3) and one mole of an ideal diatomic gas (γ=7∕5). Here, γ is the ratio of the specific heats at constant pressure and constant volume of an ideal gas. The gas mixture does a work of 66 Joule when heated at constant pressure. The change in its internal energy is Joule.