In the followingquestions morethan one correlation is possible betweenoptions of both columns. Match the following : {:(,"Reaction",,"Entropy change"),((i) ,"A liquid vaporises",(a),DeltaS=0),((ii),"Reaction is non-spontaneous at all temperatures and " DeltaH " is positive",(b),DeltaS="positive"),((iii),"Reversible expansion of an ideal gas ",(c ) , DeltaS = "negative"):}

In the followingquestions morethan one correlation is possible between

1.	In the followingquestions morethan one correlation is possible betweenoptions of both columns. Match the following : {:(,"Reaction",,"Entropy change"),((i) ,"A liquid vaporises",(a),DeltaS=0),((ii),"Reaction is non-spontaneous at all temperatures and " DeltaH " is positive",(b),DeltaS="positive"),((iii),"Reversible expansion of an ideal gas ",(c ) , DeltaS = "negative"):}
Answer» Solution :(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)`.