Flashcards in Enthalpy Deck (8)
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1
Give the definition of Lattice Enthalpy.
The enthalpy change when 1 mole of an ionic compound forms from its constituent gaseous ions under standard conditions (101kPa, 298K).
2
Define the Standard Enthalpy Change of Atomisation.
The enthalpy change when 1 mole of gaseous atoms are formed from the element in its standard state under standard conditions.
3
Define the First Electron Affinity.
The enthalpy change when 1 electron is added to each atom in 1 mole of gaseous atoms to form 1 mole of gaseous 1- ions.
4
Define the Second Electron Affinity.
The enthalpy change when 1 electron is added to each ion in 1 mole of gaseous 1- ions to produce 1 mole of 2- gaseous ions.
5
Define the Enthalpy Change of Solution.
The enthalpy change (energy absorbed or released) when 1 mole of an ionic solid dissolves in sufficient water to produce a very dilute solution.
6
Define Enthalpy Change of Hydration.
The energy released when 1 mole of gaseous ions dissolve in sufficient water to produce a very dilute solution.
7
Quote the formula that links Lattice, Solution and Hydration enthalpy changes.
Hyd= Latt + Sol
8
