Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases.

Explore the behavior of gas particles by manipulating temperature, volume, and particle count in an interactive simulation.

Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET …

Explore the behavior of gases with PhET's interactive simulation.

Explore gas properties through interactive simulations by manipulating variables like volume, heat, and particle count to observe changes in temperature and pressure.

How did scientists figure out the structure of atoms without looking at them? Try out different models by shooting light at the atom. Check how the prediction of the model matches the …

Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases.

Heat, cool and compress atoms and molecules and watch as they change between solid, liquid and gas phases.

Pump gas molecules to a box and see what happens as you change the volume, add or remove heat, and more. Measure the temperature and pressure, and discover how the properties of …

Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and electron pairs? Find out by adding single, double or triple …

Measure the temperature and pressure, and discover how the properties of the gas vary in relation to each other. Pump gas molecules to a box and see what happens as you change …