AQA • Chemistry
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AqA 
 
 
 
 
A-level 
CHEMISTRY 
Paper 3 
June 2023
Chemical Bonding Overview PDF, Leaving Cert, A-Levels
A summary of the definitions of the enthalpies from the Thermodynamics and Energetics topics in the AQA A-Level Chemistry Course.
A summary of the Kinetics topic in the AQA A-Level Chemistry Course.
A summary of the Halogenoalkanes topic from the AQA A-Level Chemistry Course.
A summary of the Alcohols topic from the AQA A-Level Chemistry Course.
A summary of measuring enthalpy changes, including the use of a calorimeter, from the Energetics topic in the AQA A-Level Chemistry Course.
You will be provided with chemistry paper 1 QS and MS for a very cheap price GCSE only
1 
Δf H = Δ a H (Sr) + 2ΔaH (Cl) + Δ 1st IE H (Sr) + Δ 2nd IE H (Sr) + 2ΔEA H(Cl) + 
ΔLEH (Sr) 1 
Or 
– 828 = 164 + (2 x 121) + 548 + 1060 + (2 xΔEA H) + (– 2112) 
01.1 M2 2 x ΔEA H = – 730 1 
M3 ΔEA H = – 365 (kJ mol–1 
) Allow M3 = M2÷2 
(+) 365, –304.5, and –730 = 2 marks 1 
(+) 304.5, (+) 730 and –609 = 1 mark 
(+) 609 = 0 marks 
11 
–3889BaCl2 
01.2 
–2493MgO 
–2018MgCl2 
1 
All three lines must be shown 
MARK SCHEME – A-LEVEL CHEMISTRY – 7405/1 – JUNE...
M1 
Δf H = Δa H (Sr) + 2Δa H (Cl) + Δ1st IE H (Sr) + Δ2nd IE H (Sr) + 2ΔEA H(Cl) + 
ΔLEH (Sr) 1 
Or 
– 828 = 164 + (2 x 121) + 548 + 1060 + (2 x ΔEAH) + (– 2112) 
01.1 M2 2 x ΔEAH = – 730 1 
M3 ΔEAH = – 365 (kJ mol–1) Allow M3 = M2÷2 
(+) 365, –304.5, and –730 = 2 marks 1 
(+) 304.5, (+) 730 and –609 = 1 mark 
(+) 609 = 0 marks