Factors Affecting Reaction Rates

The video explores factors affecting reaction rates, including concentration, pressure, surface area, temperature, and catalysts. It explains Collision Theory and activation energy, showing how these factors influence the frequency and energy of particle collisions, thus affecting reaction rates. Catalysts lower activation energy, increasing reaction efficiency.

What is the minimum energy required for a chemical reaction to occur called?

• Reaction energy

• Kinetic energy

• Activation energy

• Collision energy

How does increasing the concentration of reactants affect the rate of reaction?

• It changes the state of reactants

• It increases the frequency of collisions

• It has no effect on the rate of reaction

• It decreases the rate of reaction

What happens to the rate of reaction when the pressure of reacting gases is increased?

• The frequency of collisions decreases

• The frequency of collisions increases

• The rate of reaction remains unchanged

• The rate of reaction decreases

How does increasing the surface area of a solid reactant affect the rate of reaction?

• It decreases the rate of reaction

• It increases the rate of reaction by exposing more surface for collisions

• It changes the chemical composition of the reactant

• It has no effect on the rate of reaction

What is the effect of temperature on the rate of reaction?

• It decreases the energy of particles

• It increases both the frequency of collisions and the energy of particles

• It only increases the energy of particles

• It only increases the frequency of collisions

Why do particles move faster when the temperature is increased?

• They gain kinetic energy

• They lose mass

• They become more reactive

• They change state

What is the role of a catalyst in a chemical reaction?

• It increases the activation energy

• It decreases the activation energy

• It changes the reactants

• It is consumed in the reaction

How does a catalyst affect the activation energy of a reaction?

• It increases the activation energy required

• It changes the products of the reaction

• It reduces the activation energy required

• It has no effect on the activation energy

What happens to a catalyst during a chemical reaction?

• It becomes a reactant

• It remains unchanged

• It changes the state of matter

• It is consumed

Which factor does not directly increase the frequency of collisions?

• Catalyst

• Concentration

• Pressure

• Surface area