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GATE 2023 PH – Question 11

Thermodynamics and Statistical Mechanics · Laws of thermodynamics · 1 mark · Multiple choice

Which one of the following entropy (S) - temperature (T) diagrams CORRECTLY represents the Carnot cycle abcda shown in the P-V diagram?

Carnot P-V cycle and candidate S-T cycles.
  1. Option A in the figure
  2. Option B in the figure
  3. Option C in the figure
  4. Option D in the figure

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Show answer and explanation

Correct answer: (A) Option A in the figure

Explanation

The hot expansion increases entropy at the high temperature; adiabatic legs keep entropy constant. Thus a,b occupy the right edge and d,c the left edge.