Rate and equilibrium

In an exothermic reaction, heat is ...

• taken in
• given out

In an endothermic reaction, heat is 

• taken in
• given out

A substance that increases speed of chemical reaction without being being changed is called:

• Catalyst
• Acid
• Base
• pressure

Activation energy is required to start a chemical reaction. What is activation energy?

• The energy needed for a reaction to occur
• The minimum amount of energy needed for a reaction to potentially occur
• The energy added by a catalyst
• The energy possessed by the products

Increase in temperature of the reactants can do one of the following

• Slow collision frequency
• Allow less effective collision between the particles
• Cause particles to lose speed
• Increase collision between the particles thus increasing the rate.

The amount of a substance in a given volume.

• concentration
• temperature
• surface area
• catalyst

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Exposing more particles for collisions is an increase in 

• concentration
• surface area
• temperature
• catalyst

Increasing the concentration increases the speed of reaction by

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

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these