Calculate the entropy change in the system, and in the surroundings and the total entropy change in the universe when during a process 75 J of heat flow out of the system at `55^(@)C` to the surrounding at `20^(@)C`.

Explanation

`T_("system")=273+55=328K`
`T_("surroundings")=20+273=293K`
`DeltaS_("univ")=DeltaS_("total")=DeltaS_("system")+DeltaS_("surroundings")`
`DeltaS_("surroundings")=(q_("system"))/(T_("system"))=(-75J)/(328K)=-0.2287JK^(-1)`
`DeltaS_("surroundings")=(q"surroundings" )/(T_("surrounding")=(+75J)/(293K)=0.260JK^(-1)`
`DeltaS_("univ")=DeltaS_("total")=[-0.2287+0.26]`
`=0.0313JK^(-1)`