Before two molecules can react chemists envision that the molecules must first collide with one another Is collision among molecules the only consideration for the molecules to react with each other?

Answer 1

Molecules must consider temperature and concentration when considering to react with one another.

Answer 2

No, collision between molecules is necessary but not the only consideration for them to react. The molecules must also possess enough energy to overcome the activation energy barrier required for the reaction to occur and they must be oriented in a way that allows the necessary bonds to be formed or broken during the collision. Additionally, factors such as temperature, pressure, and presence of a catalyst can also influence the likelihood and rate of a reaction.