Determine whether the reactions with the following `DeltaHandDeltaS` values are spontaneous or non-spontaneous. State whether the reactions are exothermin or endothermic.
(a) `Delta=-110kJ,DeltaS=+40JK^(-1)" at "400K`
(b) `DeltaH=+40kJ,DeltaS=-120JK^(-1)" at "250K`

Explanation

Given `Delta=-110kJ`
`DeltaS=40JK^(-1)` ltbr? `=0.04kjK^(-1)`
Temperature, `T=4000K`
`DeltaG=?`
Since `DeltaH` is -ve, the reaction is exothermic
`DeltaG=DeltaH-TDeltaS`
`=-110-400xx0*04`
`=-110-16`
`=-126kJ`
Si