WARM UP If 3.5 moles of CH4 gas occupy 2.33 L at 15°C, what new volume will be obtained if 2.0 moles of gas are added and the temperature is increased to 75°C?

Kinetic Molecular Theory Chemistry II

Basic Ideas Properties of gases explained by motion of individual molecules James Clerk Maxwell http://www.youtube.com/watch?v=V_TQea0aOnE

Basic Ideas Gas molecules: are far apart have mass but negligible volume are in constant, random motion frequently, elastically collide do not exert intermolecular forces have kinetic energy proportional to temperature and mass http://www.youtube.com/watch?v=4hzKvXU4374

Applications to Properties Compressibility Large distances between molecules

Applications to Gas Laws Boyle’s Law Smaller volume means more collisions, more push against container Charles’s Law Higher temp raises molecular speed, which means more and stronger push and greater volume

Applications to Gas Laws Avogadro’s Law More molecules, more collisions, greater volume Dalton’s Law No IMF’s means each gas has no effect on any other

WRAP UP Explain how Boyle’s, Charles’, and Avogadro’s Laws are all related to collisions? Why is kinetic-molecular theory used to describe gas collisions?

WARM UP List 3 characteristics of gases indicated by Clerk-Maxwell’s kinetic-molecular theory.