Rate of reaction : Concepts

List four factors that affects the rate of a reaction

• temperature

• concentration

• surface area

• volume

• catalysts

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

what factors can affect the value of the activation energy of a reaction?

• The presence of a catalyst

• changes in temperature

• changes in concentration of the reactants

• changes in pressure

Catalysts are thought to increase the rate of a chemical reaction by

• supplying the energy needed to overcome the activation energy
• increasing the temperature of the reaction
• providing less surface area for the reaction
• providing an alternative reaction pathway with a lower activation energy

Tags

NGSS.HS-PS1-4

Increasing the temperature of a chemical reaction

• lowers the activation energy of the reaction
• increases the energy of the reactant particles only
• increases the value of ΔH for the reaction
• increases the energy of the reactant and product particles

Tags

NGSS.HS-PS1-5

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Tags

NGSS.HS-PS1-5

Grinding a effervescent tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants

Tags

NGSS.HS-PS1-5

The ______________is required to break the bonds of the reactants.

• Carbonic energy

• Activation energy

• Plutonic energy

• Energi Gaib