Gibbs Free Energy (ΔG) — phase transition
Calculate ΔG for phase transition from ΔH, ΔS and temperature. ΔG = ΔH − TΔS; negative ΔG means spontaneous.
- 1ΔG = ΔH − TΔS (convert ΔS J→kJ)
-100 − 298×-0.05000 = -85.10 kJ/mol - 2ΔG < 0 → spontaneous
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Cite this tool
ToolJolt. Gibbs Free Energy (ΔG) — phase transition. ToolJolt Chemistry & Lab Tools; 2026. https://tooljolt.comGibbs Free Energy (ΔG) — phase transition for physical chemists, students and process scientists. Enter your values and read a sourced, step-by-step result instantly, right in your browser.
About Gibbs Free Energy (ΔG) — phase transition
Calculate ΔG for phase transition from ΔH, ΔS and temperature. ΔG = ΔH − TΔS; negative ΔG means spontaneous. The calculation uses ΔG = ΔH − TΔS. Why accuracy here pays off: Whether a reaction is spontaneous, how fast it goes, and how its equilibrium shifts with temperature all flow from a handful of equations. Sign and unit errors here are notoriously easy to make. phase transition: spontaneity depends on temperature when ΔH and ΔS share sign. Mistakes that trip people up: confusing rate constant with equilibrium constant; mixing J and kJ for ΔH vs ΔS; using °C instead of K. No account, no upload, no tracking of your inputs — the result is generated on your machine, which makes it reproducible, private and citable in published work.
How to use Gibbs Free Energy (ΔG) — phase transition
- 1Enter your values: ΔH (enthalpy), ΔS (entropy), Temperature.
- 2Read the headline result and the supporting figures, which recompute as you type.
- 3Open “Worked example with your numbers” to see the substituted formula step by step.
- 4Copy the result, or use the cite-this-tool snippet for your methods section.
Why use Gibbs Free Energy (ΔG) — phase transition?
- ✓Designed for physical chemists, students and process scientists who need a trustworthy answer fast
- ✓Instant, client-side result — works offline once loaded and keeps your data private
- ✓Shows the worked example step by step with your own numbers, not just a final figure
- ✓Pre-filled with sensible, niche-specific defaults so it is useful the second it loads
- ✓Mobile-friendly and completely free, with no sign-up or usage caps
Frequently asked questions
Any tips specific to this calculation?+
phase transition: spontaneity depends on temperature when ΔH and ΔS share sign. Also watch out for: confusing rate constant with equilibrium constant and dropping the minus sign in ΔG = ΔH − TΔS.
Is this gibbs free energy (δg) — phase transition free to use?+
Yes. It is completely free, needs no sign-up, and runs entirely in your browser — there are no usage limits.
What formula does it use?+
It uses ΔG = ΔH − TΔS The full worked example is shown beneath the result so you can verify each step.
What are the most common mistakes here?+
In chemical thermodynamics and kinetics, watch for: mixing J and kJ for ΔH vs ΔS; using °C instead of K; dropping the minus sign in ΔG = ΔH − TΔS; confusing rate constant with equilibrium constant. This tool shows the working so you can catch these before they cost an experiment.
Does my data leave my device?+
No. All computation happens locally in your browser. Nothing you enter — sequences, concentrations or measurements — is uploaded to any server, so it is safe for confidential work.
Can I cite this tool?+
Yes — use the “Cite this tool” snippet on the page. Many users link these calculators from methods sections, lab SOPs and teaching materials.
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