Students are investigating exothermic and endothermic reactions - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2018 - Paper 1
Question 1
Students are investigating exothermic and endothermic reactions. They are finding the temperature change in 50 cm³ water when a solid dissolves in it. The apparatus ... show full transcript
Worked Solution & Example Answer:Students are investigating exothermic and endothermic reactions - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2018 - Paper 1
Step 1
R - measure 50 cm³ water using a beaker
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Answer
Begin by measuring 50 cm³ of water using a beaker. This ensures you have an accurate amount of water for the experiment.
Step 2
P - pour the 50 cm³ water into the polystyrene cup
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Next, pour the measured water into the polystyrene cup, which will help in insulating the temperature changes.
Step 3
S - measure the initial temperature of the water
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Now, measure the initial temperature of the water using a thermometer to establish a baseline.
Step 4
Q - add the solid to the water and stir
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Afterward, add the solid to the water and stir to ensure it dissolves completely.
Step 5
T - measure the final temperature of the solution when all the solid has dissolved
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Finally, measure the final temperature of the solution after all the solid has dissolved to determine the temperature change.
