Gas Properties Simulation

Gas Properties SimulationPress Start, then heat or compress the gas.

No molecule selected · tap a molecule to track it

Drag to pan · wheel to zoom · tap a molecule

Simulation speed1.00×

Experiment

Mission: change one variable and explain every visible response.

Temperature300 K

Volume30.0 L

Amount of gas1.00 mol

Molecule type

Live measurements

Pressure83.1 kPa

Temperature300 K

Volume30.0 L

Model wall hits0 / s

Faster particles make stronger, more frequent wall collisions. Those collisions create pressure.

Pressure & temperature history

PressureTemperature

View & tracking

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Teacher tools

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Synchronized lesson

The lesson controls the chamber so every spoken idea is visible. It never starts automatically.

Language

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1. Gas particles

What to watch: particles travel in every direction.

Chapters

Gas Properties Simulation learning objectives

Connect microscopic particle motion to pressure and temperature.
Predict how pressure changes with volume, temperature and amount.
Compare fixed-temperature, fixed-pressure and fixed-volume processes.
Use the ideal-gas model to explain real situations.

Key concepts

Pressure comes from molecular impacts on walls. Temperature measures average kinetic energy. For an ideal gas, pressure × volume = amount × 8.314 × temperature, with pressure in kPa and volume in L.

The dots represent an enormous number of real molecules, so their size and spacing are conceptually scaled.

Suggested experiments

Choose Boyle, halve the volume, and compare pressure.
Choose Gay-Lussac, double kelvin temperature, and watch pressure.
At fixed volume and temperature, double the amount of gas.
Track helium and carbon dioxide at the same temperature; compare their speeds.

Explore further

Why must temperature use kelvin in gas relationships? Why does a bicycle pump warm during quick compression? How does an aerosol can behave in a hot car?

Real-world applications

Tire pressure, weather balloons, breathing, refrigeration, engines, scuba tanks and pressure cookers all involve coupled changes in gas state.

Common misconceptions

Particles do not expand when a gas expands; their average spacing changes.
Pressure is not a substance stored in the gas; it is the result of collisions.
Equal temperature does not mean equal molecular speed when masses differ.

Gas properties challenge

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