# Gibbs-Helmholtz Equation

Airpods Pro 2nd Generation

Apple's popular airpods pro. I haven't met a person with these that doesn't recommend them.

As an Amazon Associate I earn from qualifying purchases. Thank you!

**Formula:** `G = H - T∆S`

The Gibbs-Helmholtz Equation is an important thermodynamic equation that relates the Gibbs free energy change (** G**) for a process to its enthalpy change (

**) and the entropy change (**

*H***) at a constant temperature (**

*∆S***). This equation is given by**

*T***, where**

*G = H - T∆S***is the Gibbs free energy,**

*G***is the enthalpy,**

*H***is the absolute temperature in Kelvin, and**

*T***is the change in entropy. However, since**

*∆S**∆S*can sometimes be hard to measure directly, it's often more practical to measure

*∆G*directly and calculate

*∆S*using

*∆G = -T∆S*. Hence, the formula is rearranged to

*G = H - T(∆G/T)*, which simplifies to

*G = H - T∆G*.

In practical terms, this equation is used to predict the spontaneity of a reaction at a given temperature. If ** G** is negative, the reaction is spontaneous; if it is positive, the reaction is non-spontaneous. This is a crucial concept in fields such as physical chemistry, chemical engineering, and materials science where predicting reaction tendencies is necessary.

Tags: Chemistry, Thermodynamics, Gibbs Free Energy, Enthalpy, Entropy