Enthalpy and Entropy

Question 1

Lattice enthalpy

Answer 1

The enthalpy change that accompanies the formation of one mole of an ionic lattice/compound from its gaseous ions under standard conditions

Question 2

Enthalpy change of formation

Answer 2

Energy change that accompanies the formation of one mole of gaseous atoms from its standard state

Question 3

First Electron Affinity

Answer 3

Energy change that takes place when 1 e- is added to each atom in one mole of gaseous atoms to form one mole of gaseous 1- ions.

Question 4

Enthalpy change of a solution

Answer 4

The enthalpy change that takes place when one mole of a solute dissolves in a solvent.
If the solvent is water the ions from the lattice form ion clusters with water molecules as aqueous ions.