## About Gibbs Free Energy Calculator (Formula)

A Gibbs Free Energy Calculator is a tool used to calculate the change in Gibbs free energy during a chemical reaction or a physical process. Gibbs free energy is a thermodynamic concept that indicates whether a reaction is spontaneous (can occur without external influence) and if it can perform useful work.

**Formula for Gibbs Free Energy Calculation:**

The formula for calculating Gibbs free energy change (∆G) is:

**∆G = ∆H – T∆S**

Where:

**∆G:**Change in Gibbs free energy.**∆H:**Change in enthalpy (heat content) of the system.**T:**Temperature in Kelvin.**∆S:**Change in entropy (disorder) of the system.

The sign of ∆G determines the spontaneity and direction of a process:

- If ∆G is negative, the process is spontaneous and can occur without external influence (exergonic).
- If ∆G is positive, the process is non-spontaneous and requires external influence (endergonic).
- If ∆G is zero, the system is at equilibrium.

**Applications:**

**Chemical Reactions:**Chemists use the Gibbs Free Energy Calculator to predict the spontaneity and direction of chemical reactions.**Thermodynamic Analysis:**Engineers use Gibbs free energy calculations to analyze and optimize energy conversion processes.**Biochemistry:**The calculator is used to understand biological processes and enzyme-catalyzed reactions.**Phase Transitions:**Gibbs free energy calculations help in understanding phase transitions like melting and vaporization.**Equilibrium Studies:**Scientists use Gibbs free energy to determine equilibrium conditions in chemical systems.**Environmental Chemistry:**The calculator aids in understanding natural processes involving energy changes.