Thermodynamics Definitions

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Enthalpy of formation (∆Hf):
Enthalpy change when one mole of a substance is formed from its constituent elements with all substances in their standard states
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Enthalpy of combustion (∆Hc)
Enthalpy change when one mole of a substance undergoes complete combustion in oxygen with all substances in standard states
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First Ionisation enthalpy (∆Hi)
The first ionisation energy is the enthalpy change when one mole of gaseous atoms loses one electron per atom to produce gaseous 1+ ions.
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Second Ionisation enthalpy (∆Hi)
The second ionisation energy is when one mole of gaseous 2+ ions is produced from one mole of 1+ ions.
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First Electron affinity (∆Hea)
The first electron affinity is the enthalpy change when one mole of gaseous atoms gains one electron per atom to produce gaseous 1- ions.
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Second Electron affinity (∆Hea)
The second electron affinity is the enthalpy change when one mole of gaseous 1- ions gains one electron per ion to produce gaseous 2- ions.
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Enthalpy of atomisation (∆Ha)
Enthalpy change when one mole of gaseous atoms is produced from an element in its normal state.
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Hydration enthalpy (∆Hhyd)
Enthalpy change when one mole of gaseous ions completely dissolves in water into its aqueous ions
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Enthalpy of solution (∆Hsol)
Enthalpy change when one mole of an ionic solid dissolves in an amount of water large enough so that the dissolved ions are well separated and do not interact with each other.
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Bond dissociation enthalpy (∆Hdis)
Enthalpy change when one mole of covalent bonds is broken in the gaseous state.
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Lattice enthalpy of formation (∆HL)
Enthalpy change when one mole of a solid ionic compound is formed from into its constituent ions in the gas phase
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Lattice enthalpy of dissociation (∆HL)
Enthalpy change when one mole of a solid ionic compound is broken up into its constituent ions in the gas phase
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Enthalpy of Vaporisation (∆Hvap)
Enthalpy change when 1 mole of a liquid is turned to 1 mole of gas at its boiling point
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Entropy of Vaporisation (∆Svap)
Entropy change when one mole of a liquid is turned to one mole of gas at its boiling point.
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Other cards in this set

Card 2

Front

Enthalpy change when one mole of a substance undergoes complete combustion in oxygen with all substances in standard states

Back

Enthalpy of combustion (∆Hc)

Card 3

Front

The first ionisation energy is the enthalpy change when one mole of gaseous atoms loses one electron per atom to produce gaseous 1+ ions.

Back

Preview of the back of card 3

Card 4

Front

The second ionisation energy is when one mole of gaseous 2+ ions is produced from one mole of 1+ ions.

Back

Preview of the back of card 4

Card 5

Front

The first electron affinity is the enthalpy change when one mole of gaseous atoms gains one electron per atom to produce gaseous 1- ions.

Back

Preview of the back of card 5
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