Reactions

Question 1

What is the collision theory?

Answer 1

In order for a reaction to occur, molecules must collide together with sufficient force

Question 2

Define activation energy

Answer 2

The minimum quantity of energy which the reacting substance must possess in order for a reaction to occur

Question 3

What is an endothermic reaction?

Answer 3

A reaction that absorbs energy from the surroundings

Question 4

What is an exothermic reaction?

Answer 4

A reaction that releases energy into the surroundings as heat or light

Question 5

What is the rate of reaction determined by?

Answer 5

The number of molecules with sufficient energy for a reaction

Question 6

Name 5 ways you can increase the rate of reaction

Answer 6

Increase the heat
Increase the concentration
Increase the surface area
Use a catalyst
Adjust the pH

Question 7

Outline the ‘Lock and Key Model’

Answer 7

Also known as the enzyme substrate complex

Question 8

What is Gibbs free energy?

Answer 8

The energy available in a substrate to do work, it determines the chances of a spontaneous reaction occurring

Question 9

What does denaturation cause to occur in the ES-complex?

Answer 9

The substrate to be released as the shape of the active site is altered

Question 10

What is meant by exergonic reaction?

Answer 10

Negative, spontaneous

Question 11

What is meant by endergonic reaction?

Answer 11

Positive, not spontaneous