Physics
Heat
Easy

Question

A fixed mass of a gas is adiabatically made to expand to double its volume and then isochorically heated to bring the gas to the original pressure . The ratio of final to initial temperature will be

  1. 1 : 1
  2. 2 : 1
  3. 1 : 2
  4. Depends on the atomicity of the gas.

The correct answer is: 2 : 1


    Such problems can be tackled easily, by considering only the final and initial states and applying the equation of state n=constant, i.e., PV/T= constant. Evidently, the pressure is the same but volume gets doubled and so, T also gets doubled.

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