Exam 6 Review

What is the LAST step of a successful chemical reaction?

• Activated Complex forms (atoms rearrange)

• Particles Collide

• New Bonds Form

• Bonds Break

If a reaction has a LOW activation energy...

• The reaction will happen relatively fast

• The reaction will happen relatively slow.

• The activation energy does not relate to reaction rate.

What makes a chemical reaction successful?

• Particles colliding with a small amount of energy

• Particles colliding with enough energy

• Particles colliding in the correct orientation

• Particles colliding in the right environment

An example of decreasing the surface area of a substance is...

• Crushing a rock into two pieces.

• Turning rock into small pebbles

• Taking loose snow and making it into a snowball

• Taking a large lump of coal and smashing it to little pieces

Which condition would INCREASE the rate of reaction?

• Increasing the concentration of the reactants

• Decreasing the temperature

• Decreasing the surface area

• Decreasing the presssure of gaseous reactants

Which of the following scenarios would cause the FASEST reaction?

• Two solids reacting together

• Two liquids reacting together

• Two gases reacting together

How could you DECREASE the rate (speed) of a reaction?

• Increase the concentration of the reactants

• Decrease the surface area of the reactants

• Increase the pressure of gaseous reactants

• Decrease the temperature of the system

How do catalysts speed up a chemical reaction?

• They don't speed up a reaction.

• They increase the activation energy

• They make the particles collide better

• They lower the activation energy

Which reaction(s) is/are reversible?

• A

• B

• C

• D

What is activation energy?

• The amount of reactants needed for a reaction to take place

• The amount of energy needed for a reaction to take place

• The amount of heat needed for a reaction to take place

• The amount of space a reaction needs in order to take place