Engineering Thermodynamics
Universal gas constant is defined as equal to product of the molecular weight of the gas and

Ratio of two specific heats
Gas constant
Specific heat at constant volume
Specific heat at constant pressure

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Engineering Thermodynamics
Zeroth law of thermodynamics

Deals with heat engines
Deals with reversibility and irreversibility of process
Deals with conversion of mass and energy
States that if two systems are both in equilibrium with a third system, they are in thermal equilibrium with each other

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

All of these
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
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy

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