Engineering Thermodynamics
Which of the following statement is correct according to Clausis statement of second law of thermodynamics?

None of these
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.
It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.
It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

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

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

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Engineering Thermodynamics
According to Avogadro’s law

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

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