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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

Define Enthalpy Change of Neutralisation.

The enthalpy change when an acid and an alkali react to form 1 mole of water, under standard conditions.