The value of `Delta H` and `Delta S` for five different reaction are given below.
`|{:("Reaction",Delta H(kJ mol^(-)),Delta S(JK^(-)mol^(-))),(I,+98.0,+14.8),(II,+55.5,+14.8),(III,+28.3,-84.8),(IV,-40.5,+24.6),(V,+34.7," 0.0"):}|`
On the basis of these values, predict which one of these will be spontaneous at all temperature?

Options

A. Reaction `I`
B. Reaction `II`
C. Reaction `III`
D. Reaction `IV`

Answer

D

Explanation

For a reaction to be spontaneous at all temperatures `DeltaS` should be `+ve` and `DeltaH` should be `-ve` (both the factors must favour the process).
Thus, only reaction `(IV)` will be spontaneous at all temperatures.