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Edexcel A-Level Chemistry A2 12.12 Define the Terms I Standard Enthalpy Change of Atomisation Ath Ii Electron Affinity Iii Lattice Energy As the Exothermic Questions

Review A-Level Edexcel Chemistry lattice-energy definitions through atomisation equations, electron affinity signs and exothermic lattice formation.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2

Exam points

  • select atomisation equations and values for elements such as bromine, iodine or calcium
  • identify electron-affinity equations and explain positive second electron affinity
  • recognise lattice energy as exothermic formation of ionic solids from gaseous ions

Edexcel A-Level Chemistry A2 12.12 Define the Terms I Standard Enthalpy Change of Atomisation Ath Ii Electron Affinity Iii Lattice Energy As the Exothermic Questions question 1

[Maximum number: 2]

This question is about oxides of iron.

Iron also forms iron(II) oxide. The data in the table can be used to construct a Born-Haber cycle for iron(II) oxide, FeO.

Table for Question Edexcel A-Level Chemistry A2 12.12 Define the Terms I Standard Enthalpy Change of Atomisation Ath Ii Electron Affinity Iii Lattice Energy As the Exothermic Questions question 1 — Edexcel A-Level Chemistry A2

Suggest why the second electron affinity of oxygen is positive.
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