Engineering Thermodynamics
Extensive property of a system is one whose value

Does not depend on the mass of the system, like temperature, pressure, etc.
Depends on the mass of the system like volume
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
According to Avogadro’s law

The sum of partial pressure of the mixture of two gases is sum of the two
All of these
The product of the gas constant and the molecular mass of an ideal gas is constant
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules

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Engineering Thermodynamics
Which of the following is the correct statement?

All the reversible and irreversible engines have the same efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.
All the reversible engines have the same efficiency.
Irreversible engines have maximum efficiency.

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