DefinitionA <CHEMICAL POTENTIAL OF B> is an <IndirectProperty> that refers to the rate of change of a free energy of a thermodynamic system with respect to the change in the number of atoms or molecules of the species that are added to the system; for a mixture of substances i mu_B = (deltaG/delta n_B)_Tau,p,n_i where G is Gibbs energy and n_B is the amount of substance B