Engineering Thermodynamics
Kelvin Planck's law deals with

Conservation of work
Conversion of work into heat
Conversion of heat into work
Conservation of heat

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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 reversibility and irreversibility of process
Deals with heat engines

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