Engineering Thermodynamics
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Possible
Impossible
Feasible
Possible, but with lot of sophistications

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Engineering Thermodynamics
Zeroth law of thermodynamics

Deals with conversion of mass and energy
States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other
Deals with heat engines
Deals with reversibility and irreversibility of process

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