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MHT CET20225 Aug 2022Morning ShiftPhysicsThermodynamicsActual

In an adiabatic expansion of a gas initial and final temperatures are T₁ and T₂ respectively then the change in internal energy of the gas is [R = gas constant, Y = adiabatic ratio ]

Options

  1. Azero
  2. Bn R -1 (T₁-T₂ )
  3. CnR Y -1 ( ~T ₂- T ₁ )
  4. DnR ( T ₁- T ₂ )

Correct answer

C. nR Y -1 ( ~T ₂- T ₁ )

Step-by-step solution

The correct option is (C). Concept: In adiabatic process work done is equal to change in internal energy as there is not enough time for heat transfer. W = U Work done can be calculated by relation: W = p dV .

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