Gibbsenergi

Gibbs energy, also known as Gibbs free energy or Gibbs function, is a thermodynamic potential that measures the maximum reversible work that may be performed by a thermodynamic system at a constant temperature and pressure. It is denoted by the symbol G and is defined by the equation G = H - TS, where H is the enthalpy, T is the absolute temperature, and S is the entropy of the system. The Gibbs energy change for a reaction is given by the equation ΔG = ΔH - TΔS, where ΔH is the enthalpy change and ΔS is the entropy change. If ΔG is negative, the reaction is spontaneous under the given conditions. Gibbs energy is widely used in chemistry, physics, and engineering to predict the feasibility of processes and to understand the behavior of systems under various conditions. It is named after the American scientist Josiah Willard Gibbs, who first formulated the concept in the 19th century.