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The reaction between hydrogen and oxygen releases energy - AQA - GCSE Chemistry - Question 7 - 2020 - Paper 1
Question 7
The reaction between hydrogen and oxygen releases energy. A student drew a reaction profile for the reaction between hydrogen and oxygen. Figure 3 shows the studen... show full transcript
Worked Solution & Example Answer:The reaction between hydrogen and oxygen releases energy - AQA - GCSE Chemistry - Question 7 - 2020 - Paper 1
Step 1
Describe the two errors in the reaction profile
Answer
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The activation energy should be represented by a line that starts from the reactants and goes up to the peak of the graph. In the student's profile, the activation energy line is incorrect.
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The products should be shown lower on the energy axis than the reactants because the reaction is exothermic, meaning that the overall energy of the products is less than that of the reactants.