Lattice Enthalpy (OCR A-Level Chemistry A): Flashcards
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Define lattice enthalpy
Define lattice enthalpy
Enthalpy change when 1 mol ionic compound forms from gaseous ions
Sign of lattice enthalpy
Sign of lattice enthalpy
Always negative (exothermic)
Purpose of Born-Haber cycle
Purpose of Born-Haber cycle
Calculate lattice enthalpy indirectly using Hess's Law
Define
Define
Enthalpy change when 1 mol compound forms from elements
Define
Define
Enthalpy change forming 1 mol gaseous atoms from element
Sign of atomization enthalpy
Sign of atomization enthalpy
Always positive (endothermic)
Define first ionization energy
Define first ionization energy
Remove 1 electron from each atom in 1 mol gaseous atoms
Define first electron affinity
Define first electron affinity
Add 1 electron to each atom in 1 mol gaseous atoms
Sign of first electron affinity
Sign of first electron affinity
Negative (exothermic)
Sign of second electron affinity
Sign of second electron affinity
Positive (endothermic) - electron added to negative ion