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DeutschActivation Energy & Reaction Heat Simulator (2D)
2D reaction-energy diagram: tune temperature, activation energy and a catalyst to watch a Maxwell-Boltzmann swarm of molecules cross the Arrhenius barrier, and flip between exothermic and endothermic reactions.
This 2D companion draws the same Arrhenius/collision-theory reaction-energy diagram as the 3D version as a flat profile you read left to right: a swarm of dots is given random kinetic energy drawn from the 2D Maxwell–Boltzmann exponential distribution, and only the ones with enough energy crest the activation-energy hump become products — the rest bounce back and try again with a freshly sampled energy. Raise the temperature or flip the catalyst on and watch more of the swarm succeed, exactly as the live fraction and rate-constant readouts predict, and switch between an exothermic reaction (products land lower, heat released) and an endothermic one (products land higher, heat absorbed) to see how ΔH reshapes only the landing plateau, never the climb.
The Maxwell-Boltzmann energy distribution is exponential, so a modest rise in temperature shifts a disproportionately larger share of collisions above the activation-energy barrier. That is why the rate constant k grows steeply with T rather than in a straight line.
No. A catalyst opens a lower-activation-energy pathway, so more collisions succeed per second, but the energy of the reactants and products themselves is unchanged — only the barrier height drops, the two plateaus stay put.
In an exothermic reaction the product plateau sits lower than the reactant plateau, so energy is released as heat. In an endothermic reaction the product plateau sits higher, so energy is absorbed from the surroundings. Only the plateau heights change — the climb over the barrier is identical either way.
2D reaction-energy diagram with a Maxwell-Boltzmann molecule swarm, live Arrhenius rate-constant readout, catalyst toggle and exothermic/endothermic switch.
2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install