Enthalpy Definitions

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Enthalpy Change of Formation
ΔHf, is the enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions.
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Bond Dissociation enthalpy
Is the enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken.
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Enthalpy change of atomisation of an element
Is the enthaly change when 1 mole of gaseous atoms is formed from an element in its standard state
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Enthalpy Change of atomisation of a compound
Is the enthalpy change when 1 mole of compound in its standard state is converted to gaseous atoms
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First ionisation enthalpy
Is the enthalpy change when 1 mole of gaseous 1+ ions is formed from 1 mole of gaseous ions
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Second ionisation enthalpy
Is the enthalpy change when 1 mole of gaseous 2+ ions is formed from 1 mole of gaseous atoms
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First electron affinity
Is the enthalpy change when 1 mole of gaseous 1- ions is made from 1 mole of gaseous atoms
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Second electron affinity
Is the enthalpy change when 1 mole of gaseous 2- ions is made from 1 mole of gaseous 1- ions
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Enthalpy change of hydration
Is the enthalpy change when 1 mole of aqueous ions is formed from gaseous ions
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Enthalpy change of solution
Is the enthalpy change when 1 mole of solute is dissolved in sufficient solvent that no further enthalpy change occurs on further dilution
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Card 2

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Is the enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken.

Back

Bond Dissociation enthalpy

Card 3

Front

Is the enthaly change when 1 mole of gaseous atoms is formed from an element in its standard state

Back

Preview of the back of card 3

Card 4

Front

Is the enthalpy change when 1 mole of compound in its standard state is converted to gaseous atoms

Back

Preview of the back of card 4

Card 5

Front

Is the enthalpy change when 1 mole of gaseous 1+ ions is formed from 1 mole of gaseous ions

Back

Preview of the back of card 5
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