4.1 - Lattice Enthalpy Definitions Flashcards
Lattice enthalpy definition
The enthalpy change when one mole of an ionic compound is converted to gaseous ions.
Enthalpy of atomisation definition
The enthalpy change when one mole of gaseous atoms is formed from the element in its standard state.
First electron affinity definition
The enthalpy change when one mole of gaseous atoms is converted into gaseous ions with a single negative charge.
Enthalpy of solution definition
The enthalpy change when one mole of a solute dissolves in water.
Enthalpy of hydration definition
The enthalpy change when one mole of gaseous ions is converted to one mole of aqueous ions.
Conservation of energy definition
Energy cannot be created or destroyed but it can change from one form to another.
Hess’s Law definition
The enthalpy change for a reaction is independent of the route taken, provided the initial and final conditions are the same.
Average bond enthalpy definition
The energy required to break one mole of a given bond averaged over many compounds.
Bond enthalpy/energy definition
The energy required to break one mole of a specific bond.
Standard Enthalpy of formation definition
The enthalpy change when one mole of a compound is formed from its elements under standard conditions.
Standard enthalpy of neutralisation
The enthalpy change when one mole of water is produced in a neutralisation reaction under standard conditions.
First ionisation energy definition
The energy required to convert one mole of gaseous atoms into gaseous ions with a single positive charge.
Second ionisation energy definition
The energy required to convert one mole of gaseous ions with a single positive charge into gaseous ions with a double positive charge.
Third ionisation energy defintion
The energy required to convert one mole of gaseous ions with a double positive charge into gaseous ions with a triple positive charge.
Standard conditions defintion
25°C (298°K) and 1 atmosphere (100kPa)
