WARM UP 1.If 3.5 moles of CH 4 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

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

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?