Rates of Reaction - Part 2

The video explains the main factors affecting reaction rates: concentration, pressure, temperature, and surface area. Concentration affects reaction rates by altering the number of particles in a given volume. Pressure impacts reactions involving gases by changing volume and concentration. Temperature influences reaction rates by increasing particles' kinetic energy, leading to more fruitful collisions. Surface area affects reaction rates by exposing more particles to react. The video concludes with a recap of these factors and their effects on reaction rates.

Which of the following factors does NOT affect the rate of a chemical reaction?

• Color

• Pressure

• Temperature

• Concentration

How does increasing the concentration of a reactant affect the reaction rate?

• It stops the reaction.

• It increases the reaction rate.

• It has no effect on the reaction rate.

• It decreases the reaction rate.

Why does increasing pressure affect the rate of reaction in gases?

• It increases the concentration of gas particles.

• It decreases the number of collisions.

• It increases the volume of the gas.

• It changes the color of the gas.

What is the term used for collisions that result in a chemical reaction?

• Elastic collisions

• Fruitful collisions

• Inelastic collisions

• Random collisions

What happens to the average kinetic energy of particles when the temperature is increased?

• It remains the same.

• It decreases.

• It increases.

• It becomes zero.

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

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

• It increases the rate of reaction.

• It stops the reaction.

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

• It has no effect on the reaction rate.

• It increases the reaction rate.

• It decreases the reaction rate.

• It stops the reaction.