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Match the following processes with entro...

Match the following processes with entropy change :
`{:("Reaction ", "Entropy change"),("(i) A liquid vapourises " ,"(a)" DeltaS=0),("(ii) Reaction is non-spontaneous at all temperatures and " DeltaH "is positive","(b)" DeltaS = "Positive"),("(iii) Adiabetic reversible expansion of an ideal gas","(c)" DeltaS= "negative"):}`

Text Solution

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The correct Answer is:
`(i)-(b),(ii)-(c ),(iii)-(a)`
(i) When a liquid vaporises, i.e.,liquid `rarr` vapour, entropy increases, i.e.,`DeltaS = + ve`. Hence, `(i) rarr(b)`.
(ii) When `DeltaH = +ve. i.e.,` energy factor oppose . The process is non-spontaneous at all temperature if entropy factor also opposes the process, i.e., `DeltaS = - ve` . Hence,`(ii) rarr (c )`
(iii) In the reversible expansion of an ideal gas, the system remains in equilibrium at every stage. Hence, `DeltaS =0, i.e., (iii) rarr (a)`.
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