Question

What happens if the $∆\mathrm{G}$ is positive ?

Answer 1

1. Gibbs energy is a quantity applied to measure the maximum amount of work performed in a thermodynamic system at constant temperature and pressure.
2. It is given by:
   $∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}$
   $∆\mathrm{G}$is the Gibbs free energy.
   $∆\mathrm{S}$ is the Entropy of the system.
   $∆\mathrm{H}$is the Enthalpy, and T is the temperature.
3. If $∆\mathrm{G}$ is positive that means the backward reaction is favoured.
4. $∆\mathrm{G}$ can be positive only when $∆\mathrm{S}$ is negative and $∆\mathrm{H}$ is positive.
5. If $∆\mathrm{G}$ is positive that means the reaction will be non-spontaeous.
6. Hence, it will not favour the forward reaction.