What is Gibbs Free Energy?
Gibbs energy was developed in the 1870’s by Josiah Willard Gibbs. He originally termed this energy as the “available energy” in a system. His paper published in 1873, “Graphical Methods in the Thermodynamics of Fluids,” outlined how his equation could predict the behavior of systems when they are combined. Denoted by G, Gibbs Free Energy combines enthalpy and entropy into a single value. The sign of ΔG indicates the direction of a chemical reaction and determine if a reaction is spontaneous or not. When ΔG<0 : reaction is spontaneous in the direction written (i.e., the reaction is exergonic), when ΔG=0 : the system is at equilibrium and there is no net change either in forward or reverse direction and when ΔG>0 : reaction is not spontaneous and the process proceeds spontaneously in the reserve direction.
How to Calculate Gibbs Free Energy?
Gibbs Free Energy calculator uses Gibbs Free Energy = Enthalpy-Temperature*Entropy to calculate the Gibbs Free Energy, Gibbs Free Energy formula is defined as a thermodynamic potential that measures the maximum reversible work obtainable from a closed system at constant temperature and pressure, indicating the spontaneity of a process and the balance between enthalpy and entropy. Gibbs Free Energy is denoted by G symbol.
How to calculate Gibbs Free Energy using this online calculator? To use this online calculator for Gibbs Free Energy, enter Enthalpy (H), Temperature (T) & Entropy (S) and hit the calculate button. Here is how the Gibbs Free Energy calculation can be explained with given input values -> -0.019648 = 1510-298*71.