Question

Carefully observe the given diagrams which indicate standard enthalpy of formation of different states of one mole of Mg and two moles of Cl atoms and match the entries in column I and II provided

Answer 1

The enthalpy of formation of magnesium ions in aqueous state ${\Delta }_{f}H\left[M{g}^{2+}\right(aq\left)\right]$ is + 460KJ/mol.
The enthalpy of formation of chloride ions in aqueous state ${\Delta }_{f}H\left[C{l}^{-}\right(aq\left)\right]$ is 625 KJ/mol.
The enthalpy of hydration of magnesium ions in gaseous state $\Delta H{|}_{Hydration}\left[M{g}^{2+}\right(g\left)\right]$ 1900 KJ/mol.
Lattice enthalpy of magnesium chloride solid $MgC{l}_{(}s)$ is + 2510 KJ/mol.