Changes

===Pressure and Collision Theory===

The [[Particle Model]] [[explain]]s how increasing the [[pressure]] on a [[gas]], and compressing it, causes the [[particle]]s in that [[gas]] to [[collide]] more frequently (more often). This means at higher [[pressure]]s the [[particle]]s of [[reactant]]s will [[collide]] with each other more frequently, increasing the chances of them [[Chemical Reaction|reacting]] and increasing the [[Rate of Reaction|rate of reaction]].

===Concentration and Collision Theory===