Questions

• Mark scheme:

  M1 = (broken) 2(C–C) + 8(C–H) + 5(O=O) (5776 + 2(C-C)) M1 is for identifying the number and type of bonds broken / made 6(C=O) + 8(O–H) (8162)

  M2 = including 4(41) for vaporisation of water

  M3 = calculation

  M4 = (C–C) = = 252 (kJ mol–1 )

  Question