It is often caused by gallstones. Common symptoms are severe pain in the upper abdomen, nausea, and vomiting. Treatment is usually a few days in the hospital for intravenous (IV) fluids, antibiotics, and medicines to relieve pain. Chronic pancreatitis does not heal or improve.
Definition of Entropy. Entropy is a thermodynamic measure of the disorder in a system. The entropy of a reaction is calculated by comparing the disorder of the products and reactants. An increase in entropy corresponds to an increase in disorder and a dispersion of energy. An important example of a system with increasing entropy is water boiling to make steam, where the molecules have much more freedom and are more disordered.
If you take the solid and liquid, or liquid and gas, or whatever the two phases are, then at the phase change the Gibbs free energies of the two components are the same because the two states are in equilibrium. The Gibbs free energy change in the transition is: $$ \Delta G = \Delta H - T \Delta S $$ where $\Delta H$ is the change in enthalpy and $\Delta S$ is the change in entropy. The temperature $T$ is a constant because the phase change occurs at constant temperature. At the phase change temperature $\Delta G$ is zero so: $$ \Delta H = T \Delta S $$ The enthalpy change $\Delta H$ is basically the heat emitted or absorbed during the phase change, and it's balanced by the change in entropy due to the phase change.