First Ionisation Energy
The first ionisation energy is the enthalpy change accompanying the removal of one electron from each atom in one mole of gaseous atoms to form one mole of gaseous +1 ions under standard conditions. For example

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More in Lattice Enthalpy
- The Standard Enthalpy Change of Formation
- The Standard Enthalpy Change of Atomisation
- First Electron Affinity
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- Born-Haber Cycle for Sodium Oxide
- Born-Haber Cycle for Calcium Chloride
- Enthalpy Change of Hydration
All 10 lessons in Lattice Enthalpy · All OCR A-level Chemistry topics