SCS Yr 9 Rates VCOP

The minimum amount of energy needed to start a reaction.

• The Activation Energy

• The Transition State

• The Ionisation Energy

• The Maximum Energy

The highest point on an Energy Profile Diagram. What form when reactants are changing into products.

• The Activation Energy

• The Transition State

• The Ionisation Energy

• The Maximum Energy

When products turn back into reactants. The opposite to the FORWARD reaction.

• An exothermic reaction

• The forward reaction

• The back reaction

• An endothermic reaction

When reactants turn into products. The opposite to the BACK reaction.

• An exothermic reaction

• The forward reaction

• The back reaction

• An endothermic reaction

A scale that tells us how hot something is. The units are "degrees Celsius".

• Energy

• Volume

• Distance

• Temperature

A substance that speeds up a chemical reaction

• Catalyst

• Chemical

• Reactant

• Product

The chemicals we start with. They react in a chemical reaction to make a product.

• Catalyst

• Chemical

• Reactant

• Product

The chemicals that are made / produced. They are formed in a chemical reaction from reactants.

• Catalyst

• Chemical

• Reactant

• Product

A reaction that takes in energy / heat in a chemical reaction. The temperature decreases.

• Thermometer

• Endothermic reaction

• Energy profile diagram

• Exothermic reaction

A reaction that gives out energy / heat in a chemical reaction. The temperature increases.

• Thermometer

• Endothermic reaction

• Energy profile diagram

• Exothermic reaction