Free interactive chemistry · SIM-SURF-001

Adsorption

Gas molecules land on and leave a surface; coverage follows the Langmuir isotherm.

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How to use this simulation

Choose “Adsorption” and a gas.
Move the gas pressure and adsorption strength K sliders.
Watch the surface fill and read coverage θ on the graph.

What to notice

At low pressure coverage rises in proportion to P.
At high pressure a monolayer forms and θ levels off at 1.

Try this

Find the pressure that gives half coverage. How is it related to K?

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