Chemical reactions occur when reacting particles....

• collide

• pass

• interact

• are mixed

The minimum energy particles must have to react is the

• acting energy

• active energy

• activation energy

A reaction profile shows....

• the relative difference in temperature of reactants and products

• the relative difference in amounts of reactants and products

• the relative difference in energy of reactants and products

• the relative difference in volume of reactants and products

Bond making is

• Endothermic

• Exothermic

Bond breaking is..

• Endothermic

• Exothermic

Which letter shows the activation energy

• A

• B

• C

What is the definition of activation energy? Two answers are required.

• The energy needed to start a reaction

• The temperature needed to start a reaction

• The minimum energy that particles must have to react

• The maximum energy that particles must have to react.

In a reaction the energy required to break bonds is less than the energy released when bonds are made. What type of reaction is this?

• Exothermic

• Endothermic