DP Chemistry (last assessment 2024)

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Question 23M.2.HL.TZ1.6ai

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.2.HL.TZ1.6ai
Level HL Paper 2 Time zone TZ1
Command term Determine Question number i Adapted from N/A
i.
[Maximum mark: 1]
23M.2.HL.TZ1.6ai
(i)

Determine the standard enthalpy of reaction (ΔHr⦵), in kJ mol−1, for the oxidation of SO2 to SO3.

Substance Enthalpy of formation, (ΔHf⦵), in kJ mol−1
SO2 −296.8
SO3 −395.8

[1]

Markscheme

«ΔH°rxn = ΣΔH°f (Products) − ΣΔH°f (Reactants) =»
−395.8 − (−296.8)» = −99.0«kJ mol−1» ✓

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