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Enthalpy Definitions
AQA Chem 5 Thermodynamics
6
Chemistry
12th Grade
04/18/2015

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Term
Lattice enthalpy of formation
Definition
Enthalpy change for 1 mol of a molecule from its ions in the gaseous state
Term
Enthalpy of hydration
Definition
Enthalpy change when 1 mol of gaseous ions is converted into aqueous ions (or converted to an aqueous solution)
Term
Perfect ionic model
Definition
Only ionic bonds between atoms and ions are perfect spheres
Term
Enthalpy of atomisation
Definition
Enthalpy change for the formation of 1 mol of gaseous atoms from the element in their standard states
Term
Enthalpy of lattice dissociation
Definition
Enthalpy change to separate 1 mol of an ionic lattice into its gaseous ions
Term
Electron affinity
Definition
Enthalpy change when 1 mol of gaseous atoms become negatively charged ions
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