Question

What is Gibbs free energy in electrochemistry?

Answer 1

1. Electrochemistry involves the interconversion of electrical and chemical energy.
2. The available energy used up in the chemical reaction is Gibbs free energy.
3. In a chemical reaction, the Gibbs free energy is equal to the difference of enthalpy with the product of temperature and entropy.
4. The change in Gibbs free energy is positive, negative, or zero.
5. A negative change in Gibbs free energy denotes that reactants are having more energy compared to products.
6. Change in Gibbs free energy is represented as follows:
   $∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}$; where$∆\mathrm{G}$ is the change in Gibbs free energy, $∆\mathrm{H}$ is the enthalpy change in the reaction, T is the temperature, and $∆\mathrm{S}$is the change in entropy