A known mass of gaseous ammonia and excess gaseous hydrogen chloride react together to make solid ammonium chloride. Line X shows the total mass of ammonium chloride produced over time. The reaction is repeated at a higher pressure. All other conditions are kept the same. Line $$$Y$$$ shows the total mass of ammonium chloride produced over time at the higher pressure. Which diagram is correct?

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_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

Answer:

Knowledge points:

Solution:

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