Question

For a particular reversible reaction at temperature `T,DeltaH and DeltaS` were found to be +ve. If `T_(e)` is the temperature at equilibrium, the reaction would be spontaneous when
A. `T_(e) gtT`
B. `T gt T_(e)`
C. `T_(e)` is 5 times T
D. `T=T_(e)`

Answer 1

Correct Answer - B
`DeltaG=DeltaH-TDeltaS`
At equilibrium `DeltaG=0`
For a reaction to be spontaneous `DeltaG` should be negative, so T should be greater than `T_(e)`.