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Question:

Which one of the following options correctly represents a thermodynamic process that is used as a correction in the determination of the speed of sound in an ideal gas?

(I)(ii)(Q)

(IV)(ii)(R)

(III)(iv)(R)

(I)(iv)(Q)

Solution:

I: Work done by adiabatic process: W = (P₂V₂ - P₁V₁)/(γ -1)
II: Work done by isobaric process: W = -PV₂ + PV₁ = PΔV
III : Work done by isochoric Process : W = 0. As the volume is constant throughout the process.
IV: Work done by isothermal : W = -nRT ln(V₂/V₁)