Chemical Kinetics - SS2 Chemistry Past Questions and Answers - page 2

Temperature

Concentration of reactants

Surface area

Temperature decreases

Concentration of reactants decreases

Surface area decreases

Catalysts are consumed during a reaction.

Catalysts lower the activation energy of a reaction.

Catalysts increase the rate of a reaction.

Measuring the change in concentration of reactants over time.

Observing the colour change of the reaction mixture.

Measuring the production of gas or heat during the reaction.

Reactions can only occur when reactant particles collide with sufficient energy.

All collisions between reactant particles result in a chemical reaction.

Temperature and activation energy.

Concentration of reactants.

Surface area of the reactants.

Exothermic reactions release heat to the surroundings.

Exothermic reactions have higher activation energy than endothermic reactions.

Exothermic reactions always occur at a fast rate.

Directly proportional to the concentration of the reactants.

Inversely proportional to the concentration of the reactants.

Independent of the concentration of the reactants.

Increasing the temperature.

Adding a catalyst.

Decreasing the concentration of reactants.