PPolySim OS

Reaction Kinetics

How fast does a reaction go? Pick the order and watch the reactant deplete — and heat it up to see the Arrhenius speed-up.

Reaction KineticsLive

Controls

Presets

Watch reactant concentration fall over time. The reaction order sets the curve shape; raising temperature speeds the rate constant, Arrhenius-style.

▶ Run in Python

Data Inspector

Order1
Effective k0.300
Arrheniusk = A·e^(−Ea/RT)

Governing equation

Reading this result: First-order: [A] decays exponentially with a constant half-life; raising temperature lifts k_eff to 0.30, steepening the curve Arrhenius-style.

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How it works

Reaction rate depends on concentration through the rate law and on temperature through the Arrhenius equation. This tool integrates zero-, first-, and second-order kinetics so you can compare their characteristic decay shapes and half-lives.

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Frequently asked questions

Is this reaction kinetics tool really free?
Yes. Reaction Kinetics runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.