Chem - Reactivity - Rate of reaction

Question 1

What is activation energy in terms of catalysts

Answer 1

A catalyst provides an alternative reaction pathway for the reaction with a lower activation energy

Question 2

What needs to occur in order for a colistions to be effective

Answer 2

For a collision between two reactant particles to be effective particles must have energy grater then the activation energy

Question 3

What is the collision theory

Answer 3

In order for a chemical reaction to occur two or more reactant particles must collide with sufficient force and at the correct ortination. The minimum amount of energy required for a chemical reaction to proceed is called activation energy

Question 4

How does temp affect rate of reaction

Answer 4

If kinetic energy is increased there will be more energetic collisions between particles, and it is only the collitons above the activation energy that may lead to the formation of products. By increasing the number of collisions above the activation energy in a given amount of time the faster the rate of reaction becomes. Increasing temp will also mean particles are moving faster therefore will collide more often increase rate of reaction.

Question 5

How dose surface area increase the rate of reaction

Answer 5

By exposing more particles therefore more particles are able to collide

Question 6

How dose increasing the concentration increase the rate of reaction

Answer 6

Means that there are more particles that occupy the same amount of space therefore the particles are much closer together. In chemical reactions if the particles are close they will collide more often