A-LevelChemistryChemical energeticsOct/Nov 2024Paper 1 Q101 Mark
Two standard enthalpy change of formation values are given. ΔΗ [VCl2] = −452 kJ mol⁻¹ ∆Η [VC13] = −573 kJ mol⁻¹ What is the enthalpy change for the reaction 3VCl2 → 2VCl3 + V?
A-210 kJ mol⁻¹
B-121 kJ mol⁻¹
C+121 kJ mol⁻¹
D+210 kJ mol⁻¹
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The correct answer is D. This question tests the candidate's understanding of chemical energetics within the Chemistrysyllabus. The examiner's mark scheme requires...
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