engineering recuitment BHEL Engineer Trainee Mock Test 2025 Thermodynamics Second Law of Thermodynamics and Entropy Clausius Inequality
Among many statements of the second law, two statements are widely used. They are the Clausius and Kelvin-Planck statements. Now which of the following statements are true.
1
Kelvin-Planck statement says that it is impossible for any system to operate in such a way that the sole result would be an energy transfer by heat from a cooler body to a hotter body.
2
Clausius statement says that it is impossible for any system to operate in a cycle and deliver a net amount of energy by work to its surroundings while receiving energy by heat from a single thermal reservoir.
3
Any device or machine that violates clausius statement is termed as Perpetual motion machine of the first kind (PMM 1).
4
Any device or machine that violates kelvin-planck statement is termed as Perpetual motion machine of the second kind (PMM 2).