22 Enthalpy & Entropy Flashcards
What is lattice enthalpy?
Lattice enthalpy is the enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions.
Is lattice enthalpy exothermic or endothermic?
It is an exothermic change.
What is a Born-Haber cycle?
A type of energy cycle used to indirectly determine lattice enthalpy
What is the standard enthalpy change of formation?
The enthalpy change that takes place when one mole of a compound is formed from its elements under standard conditions.
What is the standard enthalpy change of atomisation?
The enthalpy change that takes place for the formation of one mole of gaseous atoms from the element in its standard states under standard conditions.
What is the first ionisation energy?
The enthalpy change required to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions.
Why is electron affinity opposite to ionisation energy?
- Electron affinity measures energy to gain electrons.
- Ionisation energy measures the energy to lose electrons.
What is the first electron affinity?
The first electron affinity is the enthalpy change that takes place when one electron is added to each atom in the one mole of gaseous atoms to form one mole of gaseous 1- ions.
What is standard enthalpy change of solution?
The standard enthalpy change of solution is the enthalpy change that takes place when one mole of solute dissolves in a solvent.
What is the enthalpy change of hydration?
The enthalpy change of hydration is the enthalpy change that accompanies the dissolving of gaseous ions in water to form one mole of aqueous ions.
