plumiEffect of temperature on reaction rates and the concept of activation energy: CAIE A‑Level Chemistry questions
Every CAIE A-Level Chemistry exam question on 8.2 Effect of temperature on reaction rates and the concept of activation energy, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Calculations
Q2(a)
The whole paper ↗![June 2024 Paper 5, question 2(a): Suggest a reason why it is necessary to wait for 10 minutes in step 5. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970151-jun24-02-a-qp.webp)
Q2(b)(i)
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Q2(b)(ii)
The whole paper ↗![June 2024 Paper 5, question 2(b)(ii): State how to use the temperature measurements to determine an accurate value for the temperature of the mixture during the reaction. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970151-jun24-02-bii-qp.webp)
Q2(c)
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Q2(d)(i)
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Q2(d)(ii)
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Q2(d)(iii)
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Q2(d)(iv)
The whole paper ↗![June 2024 Paper 5, question 2(d)(iv): Use your graph to state whether the results from the experiment are reliable. Justify your answer. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970151-jun24-02-div-qp.webp)
All 8 questions on Effect of temperature on reaction rates and the concept of activation energy, as a list
- June 2024, Paper 5, Q2(a) (1 mark): Suggest a reason why it is necessary to wait for 10 minutes in step 5. [1]
- June 2024, Paper 5, Q2(b)(i) (1 mark): State the temperature measurements that should be taken and at which stage in the p
- June 2024, Paper 5, Q2(b)(ii) (1 mark): State how to use the temperature measurements to determine an accurate value for the temperature of the mixture during the reaction. [1]
- June 2024, Paper 5, Q2(c) (2 marks): A student carries out the procedure at three different temperatures and records the measurements in Table 2.1. Complete Table 2.1. Record values for temperature
- June 2024, Paper 5, Q2(d)(i) (2 marks): A second student carries out the procedure at six different temperatures and analyses their data to give the results in Table 2.2. Table 2.2 1 / K–1 c m 1 log t
- June 2024, Paper 5, Q2(d)(ii) (2 marks): Determine the gradient of your line of best fit in Fig. 2.1. State the coordinates of both points you use in your calculation. These must be selected from your
- June 2024, Paper 5, Q2(d)(iii) (3 marks): An equation relating time and temperature variables is shown. 0 434 . E c m = – 1 A + constant log t RT Determine the activation energy, EA, of this reaction us
- June 2024, Paper 5, Q2(d)(iv) (1 mark): Use your graph to state whether the results from the experiment are reliable. Justify your answer. [1]
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