VanÔ????t HoffÔ????s Law in terms of EntropyAuthor(s): Irfan H. Lone Jr*
We show that well-known vanÃ¢Â€Â™t HoffÃ¢Â€Â™s law in chemical thermodynamics can be expressed in terms of the total entropy change by making use of the Gibbs-Helmholtz equation and the relationship between Gibbs energy and total entropy. The resulting expression provides the theoretical underpinnings of the explanation of the effect of temperature on equilibria in terms of total entropy just as conventional VanÃ¢Â€Â™t HoffÃ¢Â€Â™s law provides a theoretical basis for an explanation based on the idea of free energy. Both exothermic and endothermic cases are discussed and the central role that the total entropy change plays in determining the dependence of equilibrium constant K on temperature T has been emphasized.