Reaction Kinetics Box

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Initial A 20

Initial B 20

Initial C 0

Changing these counts applies when you reset the simulation.

Box edge length 10.0

Atom radius (A, B) 0.18

Product radius (C) 0.24

Smaller particles in a larger box give a more dilute gas, closer to the kinetic-theory ideal.

Box temperature 450 K

Higher T raises the average kinetic energy, so more collisions clear the activation barrier.

⟨E⟩ 0.0 1½ kT 0.0 E ≥ Ea 0%

Maxwell–Boltzmann Enough to react Ea

The shaded tail is the fraction of the Maxwell–Boltzmann curve with kinetic energy at or above the forward activation energy.

Enable reverse reaction

Forward Ea (A + B → C) 4.8

Reverse Ea (C → A + B) 7.6

Defaults are exothermic: reverse Ea is higher, so equilibrium slightly favors C.

20Atom A

20Atom B

0Product C

0.0 Collisions / s

0.0 Forward / s

0.0 Reverse / s