Chemistry · May / June 2026 · Paper 21 · Question 3
5070
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Hydrogen reacts with oxygen to make water. 2H2(g) + O2(g) 2H2O(g) Figure 3.1 shows the reaction pathway diagram for this reaction. energy progress of reaction 2H2(g) + O2(g) 2H2O(g) ΔH Ea Figure 3.1
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3(a)(i)[1]
3(a)(ii)[2]
3(b)[1]
3(c)[2]
3(d)[2]
3(e)[2]
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