Unit 3 - Energy Profile Diagrams

Does this show an endothermic or an exothermic reaction?

• Endothermic

• Exothermic

In an endothermic reaction...

• heat is released

• heat is absorbed

In an exothermic reaction...

• heat is released

• heat is absorbed

Is this showing an endothermic or an exothermic reaction?

• Endothermic

• Exothermic

In an endothermic reaction...

• products have more energy than reactants

• reactants have more energy than products

Collisions that result in the formation of products are called _______________ collisions

Increasing the temperature in a reaction lowers the activation energy.

• True

• False

Increasing the temperature increases the number of collisions and therefore the number of successful collisions.

• True

• False

Increasing the concentration increases the number of collisions and therefore the number of successful collisions.

• True

• False

Catalysts increase the reaction rate by lowering the activation energy

• True

• False