Enthalpy OCR A definitions

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7 Terms

1
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first ionisation energy

to remove 1 mol of electrons from 1 mol of gaseous atoms

2
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first electron affinity

Enthalpy change to form 1 mol of gaseous 1- ions from 1 mol of gaseous atoms

3
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Enthalpy change of formation

Enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions

4
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enthalpy change of atomisation

enthalpy change to form 1 mol of gaseous atoms from its elements

5
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Lattice enthalpy

Enthalpy change when 1 mole of a solid ionic compound is formed from its gaseous ions

6
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Enthalpy change of hydration

Enthalpy change to convert 1 mole of gaseous ions to 1 mol of aqueous ions

7
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Enthalpy change of solution

Enthalpy change when 1 mole of a solute is dissolved in water

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