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

It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
All of these
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy

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Engineering Thermodynamics
First law of thermodynamics

Does not enable to determine change in entropy
Provides relationship between heat, work and internal energy
All of these
Enables to determine change in internal energy of the system

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