kinetics (physical)

Question 1

What must particles do in order to react?

Answer 1

Collide with enough energy (activation energy) and the correct orientation

Question 2

Do most collisions end in a reaction

Answer 2

no

Question 3

Define activation energy

Answer 3

The minimum energy needed for particles to collide to form a reaction

Question 4

What is the effect of increasing temperature on the rate of reaction? Why?

Answer 4

Increasing temperature = increased rate of reaction because when the particles get hotter, particles have more energy and move faster so they collide more often

Question 5

What is the effect of increasing concentration/pressure on rate of reaction? Why?

Answer 5

Increased concentration/pressure = increased rate of reaction because there are more particles/smaller area so the particles are more likely to collide with eachother.

Question 6

What is a catalyst?

Answer 6

A substance which increases the rate of reaction but is not actually used up

Question 7

How do catalysts work and how do they increase the rate of reaction?

Answer 7

They provide an alternative reaction pathway (one with a lower activation energy)
Lowers the activation energy so more particles have energy and therefore there are more frequent collisions so there is an increased reaction rate