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Exam (elaborations)
AQA A-LEVEL Chemistry 7405-1 Paper 1 Mark Scheme.
AQA A-LEVEL Chemistry 7405-1.
AQA A-LEVEL Chemistry 7405-1.
Question Answers Additional comments/Guidelines Mark 01.1 M1 ΔfH = ΔaH (Sr) + 2ΔaH (Cl) + Δ1st IEH (Sr) + Δ2nd IEH (Sr) + 2ΔEAH(Cl) + ΔLEH (Sr) 1 Or – 828 = 164 + (2 x 121) + 548 + 1060 + (2 x ΔEAH) + (– 2112) 1 M2 2 x ΔEAH = – 730 M3 ΔEAH = – 365 (kJ mol–1) Allow M3 = M2÷2 1 (+) 365, –304.5, and –730 = 2 marks (+) 304.5, (+) 730 and –609 = 1 mark (+) 609 = 0 marks 11 01.3 (Has) covalen...
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