Reaction Rates

Front

What is the major theory of reaction rate?

Back

Collision theory.

Front

What is activation energy?

Back

The minimum energy that colliding particles must possess for a reaction to occur.

Front

What does an increase in temperature do to the collision frequency of reactants?

Back

It increases collision between the particles, thus increasing the rate of reaction.

Front

What is the activation energy of the forward reaction represented by in a graph?

Back

It is represented by the height of the energy barrier that must be overcome for the reaction to proceed.

Front

What is the activation energy, Ea, for a reaction if it is +200 kJ?

Back

It indicates that 200 kJ of energy is required to initiate the reaction.

Front

What happens to reaction rates when temperature increases?

Back

Reaction rates generally increase due to more frequent and effective collisions.

Front

Define collision theory.

Back

Collision theory states that for a reaction to occur, reactant particles must collide with sufficient energy and proper orientation.

Front

What is the effect of concentration on reaction rates?

Back

Increasing the concentration of reactants typically increases the rate of reaction.

Front

What role does a catalyst play in a chemical reaction?

Back

A catalyst lowers the activation energy, increasing the rate of reaction without being consumed.

Front

What is meant by effective collision?

Back

An effective collision is one that results in a chemical reaction, meaning the particles collide with enough energy and the correct orientation.