Each model has different features in order to show different aspects of the behavior of gases. In A Box shows the basic model and plots the speed and energy distribution in an ideal gas. Free Gas removes the box walls. Isothermal Piston looks at pressure, volume and temperature of a gas under a piston. Two-Gas has two chambers and two kinds of molecules that can mix.
Atmosphere imposes a gravitational field on the gas.
Adiabatic Piston has a piston with mass that can move up or down in response to its weight and the counterbalancing collisions of the gas molecules. Mechanical energy thus passes to and from the gas. Maxwell's Demon demonstrates a famous thought experiment that relates the concepts of energy and information. Heat Engine combines several features to explore a heat pump moving through the Carnot cycle. GasLab Curriculum A series of Investigations to guide the use of GasLab in the classroom is under development.