What is the correct definition of lattice enthalpy?
Enthalpy change when one mole of solid ionic compound is separated into its ions in their standard state
Enthalpy change when one mole of electrons is removed from one mole of gaseous atoms
Enthalpy change when one mole of solid ionic compound is formed from its gaseous ions under standard conditions
Enthalpy change when one mole of a compound is formed from its elements
Which ionic compound has the smallest value for lattice enthalpy?
CaBr2
NaF
MgS
MgO
Which ions hydration enthalpy is the least exothermic?
Li+
Na+
Mg2+
Ca2+
Which steps are endothermic in the Born-Haber cycle for the formation of LiCl?
I and II only
I and III only
II and III only
I, II and III
Which equation represents the second electron affinity of nitrogen?
½N2 (g) + 2e- → N2- (g)
N (g) + 2e- → N2- (g)
N2 (g) + 4e- → 2N2- (g)
N- (g) + e- → N2- (g)
