Thermodynamics Calculator

Various calculations related to ΔH and Hess’s Law, bond energies, entropy ΔH, and Gibbs free energy ΔG

Select what you want to calculate.

Mass of solution (g) Initial temperature T₁ (°C) Final temperature T₂ (°C) Specific heat capacity c (J g⁻¹ °C⁻¹) Moles of limiting reactant (mol)

Coffee‑cup calorimetry, constant pressure assumed.

Reaction (for reference)

Multiplier: 2 = double ½ = halve −1 = reverse reaction

Enter ΔH for each known reaction. Use multiplier = −1 to reverse an equation.

Bond enthalpies are average values. Common bonds may be autofilled; always use values given in the question. You may type ≡ or # for triple bonds.

Temperature T (K) ΔH (kJ mol⁻¹)

Enter S° in J mol⁻¹ K⁻¹. Common species may be autofilled; always use values given in the question. Tip: include state, e.g. H₂O(l), CO₂(g), NaCl(s).

Result

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