Thermodynamics Second Law of Thermodynamics and Entropy Performance of Heat Engines and Reversed Heat Engines
One reversible heat engine operates between 1600 K and T2 K, and another reversible heat engine operates between T2 K and 400 K. If both engines have the same heat input and output, then the temperature T2 must be equal to:
1
1000
2
1200
3
1400
4
800