Collision Theory & Reaction Rates│Please Help!

Question

For a reaction in which the reactants are gases, which of the following would increase the rate of chemical reaction? (Select all Correct Answers)

1. Decreasing the volume of the reactor
2. Increasing the volume of the reactor
3. Increasing the temperature
4. Increasing the pressure
5. Lowering the pressure

Answer 1

Factors that affect reaction rates are:

1) concentration 2) temperature 3) surface area of a solid 4) catalyst

In order for the molecules to react, they need to have EFFECTIVE COLLISIONS. If more collisions are occurring, than the reaction will happen faster.

Decreasing the volume of the reactor will cause the gas molecules to be closer together, more concentrated, so they will collide more often, increasing the rate.

Increasing the temperature will cause the molecules to have higher kinetic energy, moving faster and they are more likely to collide effectively.

Increasing the pressure would work if you are increasing the amount of gas molecules in the container again increasing the concentration and allowing for more collisions.