Question

The figure shows two isotherms at temperatures T₁ and T₂. A gas is taken from one isotherm to another isotherm through different processes. Then change in internal energy DU has

relation –

• A. DU_ab>DU_ac>DU_ad>DU_ae
• B. DU_ab = DU_ac>DU_ad>DU_ae
• C. DU_ab = DU_ac = DU_ad = DU_ae
• D. DU_ab<DU_ac<DU_ad<DU_ae

Answer 1

Answer: (C)

DU_ab = DU_ac = DU_ad = DU_ae

Answer 2

Internal energy depends only on state but not on the process. Hence its change is same for all the processes between two same states.