Kinetics Exit Quiz 1

When the rate of the forward reaction is equal to the rate of the reverse reaction, the system is said to be in

• Chemical Equilibrium

• Chemical Balance

• Chemical Constant

• Chemical Reaction

How does a catalyst change during a reaction?

• It is part of the products

• It combines with the reactants

• It precipitates

• It remains unchanged

Increasing the concentration increases the speed of reaction by

• lowering activation energy
• increasing collisions
• speeding up the reactants
• exposing more reactant

Which of the following slows down the rate of a chemical reaction?

• Place the reactants in hot water
• Place the products in ice bath
• Place the reactants in a ice bath
• Keep stirring the reactants with a stirring rod

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

• Red, because the activation energy is larger
• Blue, because the activation energy is lower
• both reaction progress at the same rate

What makes an effective collision?

• When molecules collide.
• When molecules collide with the proper orientation.
• When molecules collide with proper orientation and enough kinetic energy.
• High Temperature.

What type of reaction is this?

• Endothermic
• Exothermic

What letter represents the activation energy?

• A
• B
• C
• D

Is this reaction endothermic or exothermic?

• endothermic 
• exothermic

What letter represents ΔH?

• A
• B
• C
• D