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Aim
Aim
To use the Arrhenius equation to determine the activation energy of a reaction
To use the Arrhenius equation to determine the activation energy of a reaction
A. Report & Analyse Results
A. Report & Analyse Results
1. Record your results.
2. Calculate temperatures in Kelvin, K, and fill in the third column of the table (0°C = 273 K).
3. Fill in the fourth column of the table by dividing each of the temperatures into 1.
4. Fill in the fifth column by taking natural logs of the times.
5. Plot a graph of ln t (y-axis) against 1 / T (x-axis).
Learning Tip
Learning Tip
Things to consider CPAC 5a
Things to consider CPAC 5a
CPAC 5a - Uses appropriate software and/or tools to process data, carry out research and report findings.
· use an excel spreadsheet to convert temp in ⁰C to K to 1/T(K-1)
· use an excel spreadsheet to convert time to ln(1/t)
· line graph drawn in excel
· use excel to find gradient of line of best fit
· Use excel to calculate the activation energy
B. Evaluate your report by answering the questions
B. Evaluate your report by answering the questions
1. Write an equation for the reaction between bromine and phenol.
2. What function does the methyl red have in this experiment?
3. Measure the gradient of your graph.
4. Calculate the activation energy of the reaction, Ea.
C. Evaluate your Practical by Completing the Form - so you know where you should aim to make improvements in future
C. Evaluate your Practical by Completing the Form - so you know where you should aim to make improvements in future
Required Resources
Required Resources
Consult CLEAPSS Hazcards® 70A,80, 95A, 98A, 47B,32. Perform a risk assessment using up-to-date information before this practical is carried out
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