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Question

Consider the quantity MkTpV of an ideal gas where M is the mass of the gas. It depends on the
(a) temperature of the gas
(b) volume of the gas
(c) pressure of the gas
(d) nature of the gas.

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Solution


In an ideal gas, the equation of state is given byPV=nRTPV=nNARNATPV=nNAkT1nNA=kTPVMultiplying both sides by mass of the gas M, we getMnNA=MkTPVNow, nNA gives the total number of molecules of the gas.Also, MnNA gives the mass of a single molecule.Hence,MkTPV is the mass of a single molecule of the gas, Molecular mass is a property of the gas.

Thus, (d) is the correct answer.

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