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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Engineering Thermodynamics
The work ratio of a gas turbine plant is given by

(Actual temperature drop)/(Isentropic temperature drop)
(Net work output)/(Heat supplied)
(Net work output)/(Work-done by the turbine)
(Isentropic increase in temperature)/(Actual increase in temperature)

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