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Concepts Of Physics MCQ Edition [Volume 2]PhysicsLaws of Thermodynamics

As depicted in the figure, an ideal gas transitions from state i to state f . The work done by the gas during this process

Options

  1. Ais positive
  2. Bis negative
  3. Cis zero
  4. Dcannot be deduced from this information

Correct answer

C. is zero

Step-by-step solution

From the given p-T graph, the process is represented by a straight line passing through the origin. This implies that the pressure p is directly proportional to the temperature T , i.e., p T , or p T = constant . According to the ideal gas equation, pV = nRT , which can be rewritten as p T = nR V . Since p T is constant and nR is constant for a given amount of gas, the volume V must be constant. Thus, the process is isochoric. The work done by a gas is given by W = p , dV . Since the volume is constant, the change

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