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Practical Guide
Chemistry
Temperature Changes
This document contains:
Links to YouTube clips showing the practical procedure
Information from examination boards AQA, OCR, Edexcel
Potential examination questions and answers
This resource is strictly for the use of member schools for as long as they remain members of The PiXL Club. It may not be copied, sold nor transferred to a third party or used by the school after membership ceases. Until such time it may be freely used within the member school.
All opinions and contributions are those of the authors. The contents of this resource are not connected with nor endorsed by any other company, organisation or institution.
Commissioned by The PiXL Club Ltd. November 2016
The PiXL Club Ltd, Company number
© Copyright The PiXL Club Ltd, 2016

2. Required practical – exam boards
AQA
Edexcel
OCR

3. Practical procedure: Temperature Changes
Video 1
Video 2
Click on each of the tabs to take you to a YouTube clip. Please note these are external sites to PiXL, PiXL does not control the content of these sites.
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4. Possible examination style questions
Define the terms endothermic reaction and exothermic reaction in terms of energy and temperature.
Plan an investigation to determine how the type of metal added to copper sulphate affects the temperature change of the reaction. State which variables you will keep constant.

5. Possible examination style questions answers
Define the terms endothermic reaction and exothermic reaction in terms of energy and temperature.
ANSWER:
Endothermic – energy goes into the reaction/temperature falls
Exothermic – energy is released from the reaction/temperature rises

6. Possible examination style questions answers
Plan an investigation to determine how the type of metal added to copper sulphate affects the temperature change of the reaction. State which variables you will keep constant.
ANSWER:
Insulated container
Specific volume copper sulphate – keep constant volume
Measure temperature before
Add metal – specific mass/same surface area
Measure final temperature
Find difference in temperature
Repeat with different metals

7. Key questions: Write a hypothesis for the reaction.
Does the data agree with the hypothesis?
How will you prevent heat loss during the reaction?
Find the gradient of your line of best fit.
Explain how you could increase the accuracy of your data.
Identify the anomaly in the data.
Calculate the temperature change.

8. Summary document
A summary document is also available on Huddle which contains all the relevant information about this practical from the different examination boards. It includes practical methods and other potential examination questions.