Chemical Kinetics: Rate of Reaction

What is the definition of rate of reaction?

• Rate of reaction is the temperature at which a reaction takes place

• Rate of reaction is the measure of how quickly reactants are converted into products in a chemical reaction.

• Rate of reaction is the speed at which a reaction occurs

• Rate of reaction is the amount of reactants left after a reaction

Explain the factors that can affect the rate of a chemical reaction.

• Time of day

• Humidity level

• Color of the reactants

• Temperature, concentration of reactants, surface area, presence of a catalyst, pressure

How is the rate of a reaction typically expressed?

• Change in pressure of reactants or products per unit time

• Change in volume of reactants or products per unit time

• Change in temperature of reactants or products per unit time

• Change in concentration of reactants or products per unit time

What is the difference between average rate and instantaneous rate of reaction?

• Average rate is the rate at a specific moment in time

• Instantaneous rate is calculated over a period of time

• The average rate is always faster than the instantaneous rate

• The average rate of reaction is calculated over a period of time, while the instantaneous rate of reaction is the rate at a specific moment in time.

Discuss the role of catalysts in altering the rate of a chemical reaction.

• Catalysts have no effect on the rate of reaction

• Catalysts lower the activation energy barrier, increasing the rate of reaction without being consumed.

• Catalysts are consumed during the reaction

• Catalysts increase the activation energy barrier, slowing down the reaction

Define the term 'rate-determining step' in a reaction mechanism.

• The rate-determining step is the step with the highest product yield.

• The rate-determining step is the slowest step in a reaction mechanism.

• The rate-determining step is the step with the lowest activation energy.

• The rate-determining step is the first step in a reaction mechanism.

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

• Temperature has no effect on the rate of a chemical reaction.

• Temperature decreases the rate of a chemical reaction.

• Temperature only affects the color of a chemical reaction.

• Temperature generally increases the rate of a chemical reaction.

Describe the collision theory and its significance in chemical kinetics.

• The collision theory is irrelevant in chemical kinetics

• Factors like temperature and concentration have no impact on reaction rates

• The collision theory is significant in chemical kinetics as it provides a framework for understanding reaction rates and factors that influence them, such as temperature, concentration, and catalysts.

• Collision theory only applies to solid-state reactions

How does concentration of reactants influence the rate of a reaction?

• Increasing the concentration of reactants generally increases the rate of a reaction.

• Decreasing the concentration of reactants generally increases the rate of a reaction.

• Increasing the concentration of reactants generally decreases the rate of a reaction.

• The concentration of reactants has no effect on the rate of a reaction.

Explain the concept of reaction order and its relation to the rate law of a reaction.

• Rate law equation is not related to the concentration of reactants

• Reaction order is inversely proportional to the rate of reaction

• The concept of reaction order is directly related to the rate law of a reaction as the rate law equation includes the reaction order of each reactant involved in the reaction. The rate law equation expresses how the rate of the reaction depends on the concentration of reactants, with each reactant's order determining the impact of its concentration on the reaction rate.

• Reaction order is determined by the color of the reactants