railway RRB JE (CBT I + CBT II) Mock Test 2024 Thermodynamics Second Law of Thermodynamics and Entropy Statements of Second Law of Thermodynamics
The second law of thermodynamics implies:
1
whole of the heat can be converted into mechanical energy.
2
no heat engine can have 100% efficiency.
3
same heat engines working in reversible process can have 100% efficiency.
4
a refrigerator can reduce the temperature to absolute zero.