Select the incorrect expression from the following expressions.

Options

A. `DeltaS_("total")=DeltaS_("system")+DeltaS_("surr")`
B. `DeltaS_("surr")=(DeltaH_("surr"))/(T)=-(DeltaH_("sys"))/(T)`
C. `DeltaS_("total") lt 0` (spontaneous process)
D. `DeltaG=Delta-TDeltaS`

Answer

C

Explanation

We know that,
`DeltaS_("total")=DeltaS_("system")+DeltaS_("surr")`
Also, entropy change of surroundings
`DeltsS_("surr")=(DeltaS_("surr"))/(T)=-(DeltaH_("sys"))/(T)`
For spontaneous process, `DeltaS_("total")gt0`
and `DeltaG=Delta-TDeltaS`