Engineering Thermodynamics
Temperature of a gas is produced due to

Kinetic energy of molecules
Repulsion of molecules
Its heating value
Surface tension of molecules

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

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

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Engineering Thermodynamics
According to Avogadro's law, for a given pressure and temperature, each molecule of a gas

Occupies same volume
Occupies volume inversely proportional to its specific weight
Occupies volume proportional to its specific weight
Occupies volume inversely proportional to its molecular weight

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