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KCET2010ChemistryThermodynamics (C)

Based on the first law of thermodynamics, which one of the following is correct?

Options

  1. AFor an isochoric process = E =- q
  2. BFor an adiabatic process = E =- W
  3. CFor an isothermal process = q =+ w
  4. DFor a cyclic process q=-w

Correct answer

D. For a cyclic process q=-w

Step-by-step solution

First law of Thermodynamics is E = Q + W (a) For isochoric process, V=0 W = p V =0 E = Q (b) For adiabatic process, Q=0 E = W (c) For isothermal process, T =0 and aligned E &=0 Q &=- W aligned (d) For cyclic process, state functions like aligned E &=0 Q &=-W aligned

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