版权所有：华东理工大学物理化学教研室 23 The perfect gas The simplest state of matter is a gas, a form of matter that fills any container it occupies. A gas may be pictured as a collection of molecules in continuous random motion, with speeds that increase as the temperature is raised. A gas differs from a liquid in that the molecules of a gas are widely separated from one another and move in paths t h a t a r e l a r g e l y unaffected by intermolecular forces. 1. The properties of gases版权所有：华东理工大学物理化学教研室 23 The perfect gas The simplest state of matter is a gas, a form of matter that fills any container it occupies. A gas may be pictured as a collection of molecules in continuous random motion, with speeds that increase as the temperature is raised. A gas differs from a liquid in that the molecules of a gas are widely separated from one another and move in paths t h a t a r e l a r g e l y unaffected by intermolecular forces. 1. The properties of gases