For a reaction to be spontaneous at all temperatures

Options

A. `Delta G` and `Delta H` should be negative
B. `Delta G` and `Delta H` should be positive
C. `Delta G = Delta S =0`
D. `Delta H lt Delta G`

Answer

A

Explanation

From Gibb's Helmholtz equation,
`Delta G=Delta H-T Delta S`
For a reaction to be spontaneus, `Delta G` must be negative. If `Delta G` and `Delta H` are negative, then reaction will be spontaneous at all temperatures.