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Consider the following decomposition reaction that takes place in a sealed 2 dm³ container: 2N₂O₅(g) → 4NO₂(g) + O₂(g) The graph below shows how the concentrations of N₂O₅(g) and NO₂(g) change with time - NSC Physical Sciences - Question 5 - 2023 - Paper 2
Question 5
Consider the following decomposition reaction that takes place in a sealed 2 dm³ container: 2N₂O₅(g) → 4NO₂(g) + O₂(g) The graph below shows how the concentrations... show full transcript
Worked Solution & Example Answer:Consider the following decomposition reaction that takes place in a sealed 2 dm³ container: 2N₂O₅(g) → 4NO₂(g) + O₂(g) The graph below shows how the concentrations of N₂O₅(g) and NO₂(g) change with time - NSC Physical Sciences - Question 5 - 2023 - Paper 2
Step 1
Refer to the graph above and give a reason why curve A represents the change in the concentration of NO₂(g).
Answer
Curve A represents the concentration of NO₂(g) because it shows a gradual increase in concentration over time as N₂O₅ decomposes. As the reaction proceeds, the amount of NO₂(g) produced rises steadily, indicating that NO₂ is being formed from the decomposition of N₂O₅, hence showing a direct relationship in its concentration increase.
Step 2
Is this statement TRUE or FALSE? Give a reason for the answer.
Answer
The statement is TRUE. The rate of decomposition of N₂O₅(g) being half the rate of formation of NO₂(g) is consistent with the stoichiometry of the reaction. For every mole of N₂O₅ that decomposes, two moles of NO₂ are formed, indicating that the rate of formation of NO₂ is double that of the decomposition of N₂O₅.