Question

How does temperature affect Gibbs's free energy?

Answer 1

Gibbs Free energy: It is the energy of a substance which is used in chemical reactions. The Gibbs free energy is used to predict whether the reaction is spontaneous and it also indicates its thermodynamics properties.

Effect of temperature on Gibbs free energy:

• The conditions will depend upon the thermodynamic equation $∆\mathrm{G}=∆\mathrm{H}–\mathrm{T}∆\mathrm{S}$ here, G is the free energy, H is the enthalpy, T is the temperature and S is the entropy. On increasing the temperature the Gibbs free energy will increase or decrease it will depend upon the entropy of the given reaction.
• If the value $∆\mathrm{S}$ is positive, then the value of $-\mathrm{T}∆\mathrm{S}$will become more negative. On increasing the temperature, the value of free energy becomes very small.

Thus, The value of entropy in Gibbs free energy is affected by temperature.