Thermodynamics Lab

Chemistry Thermodynamics – Gibbs Free Energy Online Lab

Chemical thermodynamics predicts whether a reaction will occur spontaneously and how much energy it releases or absorbs. This simulation lets you calculate enthalpy (ΔH) using Hess's law, determine entropy change (ΔS), and combine them into Gibbs free energy (ΔG = ΔH − TΔS) to assess spontaneity across a range of temperatures.

What you can do in this simulation

• Calculate reaction enthalpy (ΔH°) using standard enthalpies of formation and Hess's law
• Determine entropy change (ΔS°) for reactions and identify whether disorder increases or decreases
• Compute Gibbs free energy (ΔG°) and predict spontaneity at different temperatures
• Find the temperature crossover where a reaction switches from spontaneous to non-spontaneous
• Relate ΔG° to the equilibrium constant K via ΔG° = −RT ln K

Concepts covered

enthalpy ΔH · entropy ΔS · Gibbs free energy ΔG · Hess's law · spontaneity · thermodynamic equilibrium

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