A2 enthalpy definitions
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Last updated 2:27 PM on 9/28/25
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8 Terms
1
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lattice
the enthalpy change when one mole of the ionic lattice is formed from its ions in the gaseous state under standard conditions
2
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formation
the enthalpy change when one mole of substance is formed from its elements in their standard states under standard conditions
3
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combustion
the enthalpy change when one mole of substance is completely burnt in excess oxygen under standard conditions
4
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atomisation
the enthalpy change when one mole of gaseous atoms are formed from an element in its standard state under standard conditions
5
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ionising energy
the enthalpy change when one mole of electrons is removed from one mole of gaseous atoms under standard conditions
6
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electron affinity
the enthalpy change when one mole of electrons is added to one mole of gaseous atoms under standard conditions
7
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solution
the amount of energy required to completely dissolve one mole of a substance to form a 1moldm-3 solution under standard conditions
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hydration
the amount of energy required to form one mole of an aqueous solution from its gaseous ions under standard conditions
Note 
Flashcards (20)