Engineering Thermodynamics
The __________ states that change of internal energy of a perfect gas is directly proportional to the change of temperature.

Boyle's law
Gay-Lussac law
Joule's law
Charle's law

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Engineering Thermodynamics
According to Clausius statement of second law of thermodynamics

Heat can be transferred from low temperature to high temperature source if COP of process is more than unity
Heat can
Heat can
Heat can be transferred for low temperature to high temperature source by using refrigeration cycle

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