A-LevelChemistryChemical energetics9701/12 · Feb/Mar 2019 · Q91 Mark

The equation for a chemical reaction is shown. All substances are in their standard states. XeF₆ + 3H₂O → XeO₃ + 6HF Which statement describes the standard enthalpy change of reaction for this reaction?

Athe enthalpy change when a total of one mole of products is produced

Bthe enthalpy change when a total of one mole of reactants is reacted

Cthe enthalpy change when one mole of water reacts

Dthe enthalpy change when six moles of hydrogen fluoride are produced

✓ Correct answer

D: the enthalpy change when six moles of hydrogen fluoride are produced

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2019 Paper 1 Variant 2, question 9.

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