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). The form below provides you with blanks to enter the individual enthalpies or free energy d ata 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.
The form below calculates the reaction enthalphy for:
Keep in mind the following rules:
| Enthalphy Change | Spontaneous Reaction? |
|---|---|
| Exothermic (dH <> | Yes, dG <> |
| Exothermic (dH <> | If |T dS| < |dH| |
| Endothermic (dH > 0) | If T dS > dH |
| Endothermic (dH > 0) | No, dG > 0 |
