5.2.1 – Lattice Enthalpy - Defintions Flashcards
(13 cards)
What is a Born-Haber Cycle?
A cycle which can be used to calculate the lattice enthalpy of an ionic compound using other enthalpy changes
Define Conservation of Energy
The total energy of an isolated system remains constant (energy cannot be lost or created)
What is Enthalpy (H)?
A value that represents the heat content of a system
Define Enthalpy Change (ΔH)
The change in the heat content of a system during a reaction
What is the Enthalpy Change of Atomisation (ΔH)?
The enthalpy change that takes place when one mole of gaseous atoms is formed from an element in its standard state
Define Enthalpy Change of Formation (ΔfH)
The enthalpy change that takes place when one mole of a compound is formed from its elements
What is the Enthalpy Change of Hydration (ΔhydH)?
The enthalpy change that takes place when one mole of gaseous ions are dissolved in water (exothermic)
Define Enthalpy Change of Solution (ΔsolH)
The enthalpy change that takes place when one mole of solute is dissolved
What is First Electron Affinity?
The amount of energy released when one mole of electrons is added to one mole of gaseous atoms, forming one mole of 1⁻ ions
Define First Ionisation Energy
The removal of one mole of electrons from one mole of gaseous atoms to form one mole of 1⁺ ions
What is an Ionic Bond?
Electrostatic attraction between positive and negative ions
Define Giant Ionic Lattice
A regular repeating structure made up of oppositely charged ions
What is Lattice Enthalpy (ΔLEH)?
The formation of one mole of an ionic lattice from gaseous ions
