Question

`{:(,"Column I",,"Column 2",,"Column 3",),(,"Enthalpy and",,"Entropy change",,"Entropy change of",),(,"internal energy change",,"of the system",,"the surroundings",),((I),DeltaH=0,(i),(DeltaH)/(T),(P),-(DeltaH)/(T),),((II),DeltaU=0,(ii),0,(Q),0,),((III),DeltaH=+ve,(iii),+ve,(R),+ve,),((IV),DeltaH=-ve,(iv),-ve,(S),-ve,):}`
The only incorrect combination for `P_(4) ("red") rarr P_(4) ("black")` which is a reversible phase transition at constant temperature and pressure.
A. `(IV)-(i)-(P)`
B. `(IV)-(iv)-(P)`
C. `(III)-(i)-(R )`
D. `(IV)-(i)-(R )`

Answer 1

Correct Answer - C
`{:(,DeltaH=-ve,),(P_(4)("red")rarrP_(4)("black"),DeltaS=-ve,),(,DeltaS_("surr")=+ve,):}`
For an irreversible adibatic compression,
`DeltaH=+ve`
`DeltaS=+ve`
`DeltaS_("surr")=0`
For interconversion of enantiomers,
`DeltaH=0`
`DeltaS=+ve`
`DeltaS_("surr")=0`