Collision Theory & Factors Affecting Rate of Reaction

The rate of a chemical reaction is NOT affected by which of the following:

• temperature
• concentration
• particle size (surface area)
• All of these affect reaction rates

The rate of a reaction increases as temperature__________________.

• Decreases
• Increases
• Stays the Same

Products will form faster if____________

• the particle size of the reactants are larger.
• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Catalysts permit reactions to proceed along a ___________energy path.

• lower
• higher

Which PE Diagram represents an endothermic reaction?

• A

• B

What is the rate of reaction?

• How much energy is needed for a reaction to occur.

• The energy required to break a bond.

• The time it takes for a reaction to occur.

• Collision Theory

Which has more surface area?

• Large chunks of chalk

• Cube of sugar

• Powdered sugar

• Small chunks of sugar

What criteria must be met for reactant collisions to result in a successful product?

• The reactants must collide with each other

• The reactants must collide with enough energy and be in the right positions

• The reactants must have enough energy to form the activated complex

Which of the following is/are the fundamental idea(s) of collision theory?

• Molecules react by colliding together
• The effective collisions must occur with certain minimum amounts of energy 
• In a large sample, the greater the number of effective collisions, and the faster the rate of reaction
• All of the above