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The figure shows two isotherms at temperatures T 1 and T 2 . A gas is taken from one isotherm to another isotherm through different processes. Then change in internal energy Δ U has a relation –

Options

  1. AΔ U ab > Δ U ac > Δ U ad > Δ U ae
  2. BΔ U ab = Δ U ac > Δ U ad > Δ U ae
  3. CΔ U ab = Δ U ac = Δ U ad = Δ U ae
  4. D&Delta; U ab < &Delta; U ac < &Delta; U ad < &Delta; U ae

Correct answer

C. &Delta; U ab = &Delta; U ac = &Delta; U ad = &Delta; U ae

Step-by-step solution

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

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