Teaching MPPSC Assistant Professor Mock Test Series 2025 Thermodynamics Second Law of Thermodynamics and Entropy Efficiency of Reversible Heat Engine
A Carnot engine operates between a hot reservoir at temperature TH = 350 K and a cold reservoir at temperature TL = 200 K . In one complete cycle, the engine absorbs 1200 J of heat from the hot reservoir. If the engine does 400 J of work per cycle, which of the following relation is correct?
| Column -1 | Column-2 |
| 1) The efficiency of the engine is | a) 0.8 |
| 2) The heat (kJ) rejected to the cold reservoir is | b) 0.43 |
| 3) The change in entropy of the engine during one cycle is | c) (+) |
| 4) The Entropy of the universe always | d) zero |
| 5) The work done (kJ) by the engine is | e) 1.2 |
1
1- a, 2-b, 3-d, 4-c, 5-e
2
1- b, 2-a, 3-c, 4-d, 5-e
3
1- a, 2-b, 3-d, 4-c,
4
1- b, 2-a, 3-d, 4-c