Engineering Thermodynamics
A process, in which the gas is heated or expanded in such a way that the product of its pressure and volume remains constant, is called

Adiabatic process
Isothermal process
Polytropic process
Hyperbolic process

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Engineering Thermodynamics
Zeroth law of thermodynamics

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

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