Lattice Enthalpy

• What is lattice enthalpy?

  Energy change when forming ionic lattice
• What does the formation of 1 mole of ionic lattice involve?

  Formation from gaseous ions under standard conditions
• What does a more exothermic lattice enthalpy indicate?

  Stronger ionic bonds in the lattice
• Why can't lattice enthalpy be measured directly?

  1 mole of ionic solid can't be formed from gaseous ions
• What is the enthalpy change of solution?

  Change when 1 mole of solute dissolves in water
• What is the enthalpy change of hydration?

  Change when gaseous ions dissolve in water
• What factors impact the size of lattice enthalpy?

  • Size of ions involved
  • Charges on the ions
  • Ionic bond strength
• Which ions have more negative lattice enthalpy values?

  Smaller ions due to stronger attraction
• Describe the process of hydration.

  • Ionic lattice breaks
  • Ions become part of the solution
  • Positive ions attracted to negative oxygen
  • Negative ions attracted to positive hydrogen
• What factors impact the magnitude of the enthalpy of hydration?

  • Size of the ion
  • Charge on the ions