Engineering Thermodynamics
A definite area or a space where some thermodynamic process takes place is known as

Thermodynamic system
Thermodynamic cycle
Thermodynamic process
Thermodynamic law

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

It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
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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