Question

In a gas equation, PV= RT V refers to the volume of

• A. any amount of a gas
• B. one gram mass of a gas
• C. one gram mole of gas
• D. one litre of gas

Answer 1

Answer: (C)

one gram mole of gas

Answer 2

In the equation PV=nRT, R is the universal gas constant which has the units as $J mol ^{-1} K^{-1}$. Comparing the units on both the sides we see that the $n$ has the units of moles. Thus the equation PV=RT represents the volume of 1 mole.