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Concepts Of Physics MCQ Edition [Volume 2]PhysicsSpecific Heat Capacities of Gases

Examine the processes A and B displayed in the figure. It is possible that

Options

  1. Aboth processes are adiabatic
  2. Bprocess A is isothermal and process B is adiabatic
  3. Cprocess A is adiabatic and process B is isothermal
  4. Dboth processes are isothermal

Correct answer

B. process A is isothermal and process B is adiabatic

Step-by-step solution

The slope of a process on a p-V diagram is given by dp dV . For an isothermal process, pV = constant , which gives dp dV = - p V . For an adiabatic process, pV^ = constant , which gives dp dV = - p V . Since > 1 , the adiabatic curve is steeper than the isothermal curve. For expansion from the same initial state, the adiabatic curve will lie below the isothermal curve. In the given figure, curve B lies below curve A, meaning curve B is steeper than curve A. Therefore, it is possible that process A is isothermal and

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