Question

What is delta G?

Answer 1

Gibbs Free Energy $\left(\mathrm{G}\right)$

• It is the amount of energy in a system that can be used to do work as a result of a chemical process.

Change in Free energy (Delta $\mathrm{G}$)

• Free energy is generally given by the equation $\mathrm{G}=\mathrm{H}-\mathrm{TS}$
• Change in Gibbs free energy of a system is represented by delta G.
• Free energy is defined as the change in the enthalpy ($\mathrm{H}$) of the system minus the product of the temperature and the change in the entropy ($\mathrm{S}$) of the system.
• The sign for spontaneity is Delta G, and these are the two things that can influence it and are given by the formula:

$∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}$

Conditions

• If $∆\mathrm{G}>0$; Reaction is Non-spontaneous
• If $∆\mathrm{G}<0$; Reaction is spontaneous.
• If $∆\mathrm{G}=0$; Reaction is in equilibrium.