Reaction Rates

According to Collision Theory, what is needed for a reaction to occur?

• Proper ORIENTATION is NOT necessary for a reaction to occur.

• Molecules must NOT collide for a reaction to occur.

• Molecules must have the correct SPEED and ORIENTATION.

When the person smashed the garlic, it ___________ the surface area (Made it larger)

• Increased

• decreased

• Did Nothing

What is the minimum energy that reacting particles must have to undergo a successful reaction called?

• Activation energy

• Kinetic energy

• Potential energy

• Thermal energy

How does temperature affect the rate of a chemical reaction according to collision theory?

• Increasing temperature decreases the energy of molecules, thus reducing the reaction rate.

• Increasing temperature does not affect the reaction rate.

• Increasing temperature increases the energy of molecules, thus increasing the reaction rate.

• Increasing temperature changes the color of reactants, thus affecting the reaction rate.

What role does a catalyst play in a chemical reaction according to the collision theory?

• It increases the temperature of the reaction.

• It decreases the activation energy needed for the reaction.

• It increases the concentration of reactants.

• It changes the color of the reactants.

When you ________ something down, it will decrease the temperature.

• cool

• heat

• Nothing

A reaction will happen FASTER if the molecules are heated up.

• True

• False

A Catalyst will _________ up a reaction and also not be consumed.

• speed

• slow

• do nothing

Does this person have better hair than Mr. Daniel?

• Yes

• No