Kinetics I | Edexcel A-Level Chemistry (9CH0)
Kinetics I
- 32 questions
- 3 subtopics
- Paper 2: advanced organic and physical chemistry
- Paper 2 and Paper 3
Covers collision theory and what changes a rate, the Maxwell-Boltzmann distribution and how temperature moves it, and how a catalyst works..
It covers collision theory and factors affecting rate, maxwell-Boltzmann distribution and temperature and catalysts, reaction profiles and measuring rate.
Sample questions from Kinetics I
Answer each one closed book first, then open the answer.
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Collision theory and factors affecting rate
What does activation energy mean?
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The minimum energy that colliding particles must have for a reaction to take place. -
Collision theory and factors affecting rate
Why does increasing the surface area of a solid reactant increase the rate?
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More reactant particles are exposed at the surface, so collisions with them are more frequent. -
Maxwell-Boltzmann distribution and temperature
What does the total area under a Maxwell-Boltzmann curve represent?
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The total number of particles. -
Maxwell-Boltzmann distribution and temperature
Which effect of increasing temperature is the more important reason for the large increase in rate?
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The increase in the proportion of particles with energy greater than or equal to the activation energy. -
Catalysts, reaction profiles and measuring rate
What is a homogeneous catalyst?
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A catalyst that is in the same physical state (phase) as the reactants. -
Catalysts, reaction profiles and measuring rate
Define the rate of a reaction.
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The change in concentration of a reactant or product per unit time.
The 3 subtopics
One subtopic is one session. Work down the list.
| Subtopic | What it covers | Questions |
|---|---|---|
| Collision theory and factors affecting rate | The activation energy and correct orientation a successful collision needs, and how raising concentration, pressure and surface area increases the frequency of collisions rather than the proportion that succeed. | 8 |
| Maxwell-Boltzmann distribution and temperature | Recall questions on the shape of the distribution, on what the area under it represents, and on why a modest temperature rise changes the rate so much. | 9 |
| Catalysts, reaction profiles and measuring rate | How a catalyst lowers the activation energy, shown on a Maxwell–Boltzmann curve and a reaction profile, heterogeneous and homogeneous catalysts and their economic benefit, defining rate, finding rates from tangents to a concentration-time graph, and following a reaction that gives off a gas. | 15 |
How the guide is worked
Answering a question from memory stores it far better than reading the answer again. The guide runs that as a fixed procedure on one subtopic at a time, about twenty minutes a session.
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Step 1 · Closed book
Cover the answers. Work through one subtopic and write down what you can. Leave blanks where you have nothing.
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Step 2 · Open book
Go back to the top. Read each printed answer and write it out in full, including the ones you had right.
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Step 3 · Closed book again
Same questions, same order, from memory. The gap between pass one and pass three is the session result.
Read the full method, the return schedule and the research behind it.
Nearby topics
Edexcel A-Level Chemistry Active Recall Guide
Every topic, not just this one. 1,534 questions with their answers.