Engineering Thermodynamics
The efficiency of a gas turbine is given by

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

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Engineering Thermodynamics
Intensive property of a system is one whose value

Depends on the mass of the system, like volume
Does not depend on the mass of the system, like temperature, pressure, etc.
Is not dependent on the path followed but on the state
Is dependent on the path followed and not on the state

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Engineering Thermodynamics
Zeroth law of thermodynamics

Deals with heat engines
Deals with reversibility and irreversibility of process
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

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