Thermodynamics - Enthalpy definitions

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Enthalpy change of formation
The heat change when one mole of a compound is formed from its elements in their standard states under standard conditions.
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Bond dissociation enthalpy
The heat change when all the bonds of the same type in one mole of gaseous molecules are broken.
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Enthalpy change of atomisation of an element
The heat change when one mole of gaseous atoms is formed from an element in its standard state,
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Enthalpy change of atomisation of a compound
The heat change when one mole of compound is its standard state is converted into gaseous atoms.
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First ionisation enthalpy
The heat change when one mole of electrons are removed from one mole of gaseous atoms to form one mole of gaseous unipositive (1+) ions.
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Second ionisation enthalpy
The energy change when one mol of electrons are removed from one mole of gaseous unipositive ions to form one mole of gaseous 2+ ions.
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First electron affinity
The energy change when one mole of gaseous 1- ions are formed from one mole of gaseous atoms.
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Second electron affinity
The energy change when one mol of gaseous 2- ions are formed from one mole of gaseous 1- ions.
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Enthalpy change of hydration
The heat change when one mole of aqueous ions are formed from one mole of gaseous ions.
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Enthalpy change of solution
The heat change when one mole of solute is dissolved in a sufficient solvent so that no further enthalpy change occurs upon further dilution.
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Lattice formation enthalpy
The enthalpy change when one mole of a solid ionic compound is formed from its gaseous ions under standard conditions.
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Lattice dissociation enthalpy
The enthalpy change when one mole of a solid ionic compound is completely dissociated into its gaseous ions under standard conditions.
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Mean bond enthalpy
The heat change when a covalent bond is broken, averaged over a wide variety of different molecules, under standard conditions.
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Other cards in this set

Card 2

Front

The heat change when all the bonds of the same type in one mole of gaseous molecules are broken.

Back

Bond dissociation enthalpy

Card 3

Front

The heat change when one mole of gaseous atoms is formed from an element in its standard state,

Back

Preview of the back of card 3

Card 4

Front

The heat change when one mole of compound is its standard state is converted into gaseous atoms.

Back

Preview of the back of card 4

Card 5

Front

The heat change when one mole of electrons are removed from one mole of gaseous atoms to form one mole of gaseous unipositive (1+) ions.

Back

Preview of the back of card 5
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