Enthalpy and Gibbs Free Energy Calculator

Introduction : the purpose of this calculator is to calculate the value of the enthalphy of a reaction (delta H) or the Gibbs free energy of a reaction (delta G).

This tool calculates the reaction enthalphy for:

NO3 + H2O -----> HNO3 + OH

Keep in mind the following rules:

Enthalphy Change Spontaneous Reaction?
Exothermic (dH < 0) Yes, dG < 0
Exothermic (dH < 0) If |T dS| < |dH|
Endothermic (dH > 0) If T dS > dH
Endothermic (dH > 0) No, dG > 0

Enthalpy/Gibbs Free Energy Calculator

The form below provides you with blanks to enter the individual enthalpies or free energy data points for a given reaction. Once entered, simply click on the "Evaluate" button to compute the appropriate value.

Note: if you do not have a second or third reactant or product, simply enter the value of "0" in the form.

Input Value(s):

Enthalpy Results (in kcal/mol) Gibbs Free Energy Results (in kcal/mol)
Reactant A
Reactant B
Reactant C
Product A
Product B
Product C
Reactant A
Reactant B
Reactant C
Product A
Product B
Product C

Result(s):

Enthalpy Results (in kcal/mol) Gibbs Free Energy Results (in kcal/mol)
Result kcal/mol
Result kcal/mol