The GATE Grind

GATE Thermodynamics: Entropy changes, closed and open systems – Previous Year Questions

3 GATE previous year questions on Entropy changes, closed and open systems (Thermodynamics, Mechanical Engineering) with answers and explanations, from every paper.

  1. GATE 2022 ME (ME1) Q60 (2 marks, Numerical answer) – Consider a one-dimensional steady heat conduction process through a solid slab of thickness 0.1 m. The higher temperature side A has a surface…
  2. GATE 2025 ME Q54 (2 marks, Numerical answer) – A thermodynamically closed system contains 1 kg of hydrogen. The system undergoes a reversible polytropic process with polytropic index 1.3. The work…
  3. GATE 2025 ME Q55 (2 marks, Numerical answer) – A heat pump, operating in reversed Carnot cycle, maintains a steady air temperature of 300 K inside an auditorium. The heat pump receives heat from…