Engineering Thermodynamics
Zeroth law of thermodynamics

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

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Engineering Thermodynamics
The efficiency of a gas turbine is given by

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

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