TS EAMCET Medical 8 May 2019 Shift 2 Paper

A gas undergoes a thermodynamic cycle as shown in pressure-volume diagram below. The heat transferred to the gas is 300 J and 140 J along path 1 → 2 and 2 → 3 respectively. The internal energy is changed by -260 J along path 3 → 1. The work done by gas along path 1 → 2 → 3 is