Chemical energy and rates

What class are you in?

• 11X2A
• 11X2B
• 11Y2A
• 11Y2B
• Other

The minimum amount of energy that particles must have to react is called:

• Bond energy
• Chemical energy
• Reaction energy
• Activation energy

Endothermic reactions......

• Release energy to the surroundings
• Take in energy from the surroundings
• Transfer chemical energy
• Create energy

Exothermic reactions......

• Release energy to the surroundings
• Take in energy from the surroundings
• Store chemical energy
• Create energy

How do we calculate the activation energy (Ea) using the reaction profile below?

• Ea = A
• Ea = B
• Ea = A-B
• Ea = A+B

How do we calculate the energy transferred to the surroundings using the reaction profile below?

• Energy transferred = A
• Energy transferred = B
• Energy transferred = A-B
• Energy transferred = A+B

How do we calculate the energy transferred from the surroundings using the reaction profile below?

• Energy transferred = A
• Energy transferred = B
• Energy transferred = A-B
• Energy transferred = A+B

How can we tell that this is an endothermic reaction?

• The reactants have more energy than the products
• Because A is bigger than B
• The products have more energy than the reactants
• We can't tell from this diagram

How do we calculate the activation energy (Ea) using the reaction profile below?

• Ea = A
• Ea = B
• Ea = A-B
• Ea = A+B

How can we tell that this is an exothermic reaction?

• The reactants have more energy than the products
• Because A is bigger than B
• The products have more energy than the reactants
• We can't tell from this diagram