2026 · Q120
In the ideal gas equation PV = μ RT, relating pressure P, volume V and absolute temperature T, the quantity μ is
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- Anumber of moles
- Bnumber of molecules
- Cspecific heat ratio
- Dcoefficient of friction
Explanation
In the ideal gas equation PV = μRT, μ denotes the number of moles of the gas. It is not the number of molecules (that would be N in PV = NkT), not the specific heat ratio (γ), and not a coefficient of friction. Hence option A is correct.