Engineering Thermodynamics
The universal gas constant (or molar constant) of a gas is the product of

Atomic mass of the gas and the gas constant
Molecular mass of the gas and the specific heat at constant pressure
Molecular mass of the gas and the specific heat at constant volume
Molecular mass of the gas and the gas constant

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

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

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