Rates of Reactions Quiz

What is the energy that the reactants need in order to collide successfully called?

• Activation energy

• Kinetic energy

• Chemical energy

• Potential energy

What does a catalyst do in a chemical reaction?

• Increases the activation energy

• Decreases the activation energy

• Increases the temperature

• Decreases the temperature

What factor can be used to control the rate of a reaction by increasing the surface area of a solid reactant?

• Increasing the concentration of a reactant in solution

• Increasing the surface area of a solid reactant

• Increasing the energy (heat)

• Increasing the pressure of a gaseous reactant

What changes the distribution of energy in a system and increases the frequency of successful collisions in a chemical reaction?

• Increasing the pressure

• Increasing the temperature

• Decreasing the concentration

• Decreasing the surface area

What method is used to measure the rate in a practical investigation involving magnesium and acid?

• Change in temperature over time

• Volume of gaseous product versus time

• Change in color over time

• Volume of solid product versus time

What is the concept of energy as the ability to do work?

• Ability to do work over time

• Ability to do work over distance

• Ability to do work over area

• Ability to do work over volume

What is the concept of temperature as the measure of the average kinetic energy of the particles in a substance?

• Measure of kinetic energy over time

• Measure of kinetic energy over distance

• Measure of kinetic energy over area

• Measure of kinetic energy over volume

Draw a picture of the experiment set up for this experiment so someone else could copy it.

What factor affects the rate of a reaction by changing the concentration of a reactant in solution?

• Increasing the temperature

• Increasing the pressure of a gaseous reactant

• Increasing the surface area of a solid reactant

• Increasing the concentration of a reactant in solution

What is the concept of activation energy in a chemical reaction?

• Energy released during a reaction

• Energy absorbed during a reaction

• Energy required to initiate a reaction

• Energy stored in the reactants