Reaction Rates

Front

What is activation energy?

Back

Activation energy is the amount of energy required to convert the reactants into the activated complex.

Front

How does temperature affect reaction rates?

Back

Increasing the temperature of the reactants increases the collision frequency between particles, thus increasing the rate of reaction.

Front

What happens to the rate of reaction when zinc is powdered compared to a lump?

Back

Powdered zinc reacts faster than a lump of zinc due to a larger surface area, leading to more effective collisions.

Front

How can you slow down a chemical reaction?

Back

You can slow down a chemical reaction by placing the reactants in an ice bath.

Front

What is the rate exponent in a reaction?

Back

The rate exponent indicates the power to which the concentration of a reactant is raised in the rate law expression.

Front

What is the effect of surface area on reaction rates?

Back

Increasing the surface area of a reactant increases the rate of reaction by allowing more collisions to occur.

Front

Define the term 'activated complex'.

Back

The activated complex is a temporary, unstable arrangement of atoms that occurs during the transition from reactants to products.

Front

What role do catalysts play in chemical reactions?

Back

Catalysts increase the rate of a chemical reaction by lowering the activation energy required.

Front

Explain the concept of 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 relationship between concentration and reaction rate?

Back

Increasing the concentration of reactants generally increases the rate of reaction due to a higher frequency of collisions.