Gibbs free energy online calculation tool

App description

Gibbs free energy online calculation tool

Free energy refers to the part of the internal energy that
can be converted into external work in a certain
thermodynamic process. Free energy is defined in physical
chemistry according to Helmholtz's constant free
energy F and Gibbs's constant pressure free energy G.

Gibbs free energy is a kind of free energy. Gibbs free energy
is also called Gibbs function, (Gibbs energy
or Gibbs function; also known as free enthalpy) is an important
parameter in thermodynamics, commonly used G, its definition is:

\(G = U − TS + pV = H − TS\)

Where U is the internal energy of the system, T is the temperature,
S is the entropy, p is the pressure,
V is the volume, and H is the enthalpy.

The differential form of Gibbs free energy is:

\(dG = − SdT + Vdp + μdN\)

Where μ is the chemical potential, that is, the average Gibbs free

energy of each particle is equal to
the chemical potential.

Usage example

Reactant A: SiN

Reactant B: Cl2

Reactant C: None

Product A: SiCl4

Product B: N2

Product C: None

Click "Calculate Gibbs free energy" and output the result.

Gibbs free energy results (kcal/mol): 17.244

Note

When there are only two chemical formulas for reactants and
products, select "None" in the third formula.