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MHT CET Medical202621 April 2026Morning ShiftChemistryThermodynamics (C)Actual

Which of the following processes exhibits that U = Q_v ?

Options

  1. AIsothermal
  2. BIsobaric
  3. CIsochoric
  4. DAdiabatic

Correct answer

C. Isochoric

Step-by-step solution

According to the first law of thermodynamics, the change in internal energy is given by U = Q + W . The work done by the system is W = -P V . For an isochoric process, the volume remains constant, which means V = 0 . Therefore, the work done W = 0 . Substituting this into the first law equation, we get U = Q . Since the heat is exchanged at constant volume, it is denoted as Q_v . Thus, U = Q_v for an isochoric process. Answer: Isochoric

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