Engineering Thermodynamics
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)

δQ = T/ds
None of the listed here
dQ = ds/T
δQ = T.ds

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

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