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
Extensive property of a system is one whose value

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
Depends on the mass of the system like volume

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