Reaction 1 and reaction 2 both produce a gas. The total volume of gas produced in each reaction is measured every minute for 10 minutes. A graph of the results is shown. Which row describes how the rate of reaction changes, if at all, during each reaction?

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_w24_qp_12 Year：2024 Question No：17

Answer:

Knowledge points:

6.2.1.1. changing the concentration of solutions

6.2.1.2. changing the pressure of gases

6.2.1.3. changing the surface area of solids

6.2.1.4. changing the temperature

6.2.1.5. adding or removing a catalyst, including enzymes

6.2.2. State that a catalyst increases the rate of a reaction and is unchanged at the end of a reaction

6.2.3. Describe practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas

6.2.4. Interpret data, including graphs, from rate of reaction experiments

6.2.5.1. number of particles per unit volume

6.2.5.2. frequency of collisions between particles

6.2.5.3. kinetic energy of particles

6.2.5.4. activation energy

6.2.6.1. changing the concentration of solutions

6.2.6.2. changing the pressure of gases

6.2.6.3. changing the surface area of solids

6.2.6.4. changing the temperature

6.2.6.5. adding or removing a catalyst, including enzymes using collision theory

6.2.7. State that a catalyst decreases the activation energy

6.2.8. Evaluate practical methods for investigating the rate of a reaction including change in mass of a reactant or a product and the formation of a gas

Reaction 1 and reaction 2 both produce a gas. The total volume of gas produced in each reaction is measured every minute for 10 minutes. A graph of the results is shown. Which row describes how the rate of reaction changes, if at all, during each reaction?

Answer:

Knowledge points:

Solution:

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