Engineering Thermodynamics
The efficiency of a gas turbine is given by

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

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Engineering Thermodynamics
According to Avogadro's Hypothesis

The sum of partial pressure of mixture of two gases is sum of the two
Gases have two values of specific heat
The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
Product of the gas constant and the molecular weight of an ideal gas is constant

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Engineering Thermodynamics
Gases have

No value of specific heat
Only one value of specific heat
Under some conditions one value and sometimes two values of specific heat
Two values of specific heat

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