1. Chem. 212(01/02/03) - Enthalpy of Formation of MgO
Hand in to TA: MgO-Pre-lab.
Solution Calorimetry
Application of Hess’s Law
Mg(s) H+(aq)  Mg2+(aq) + H2(g) ΔH1
Mg2+(aq) + H2O(l)  MgO(s) H+(aq) ΔH2
½ O2(g) + H2(g)  H2O(l) ΔH3
Sum of above gives => Mg(s) + ½ O2(g)  MgO(s)
ΔH°f(MgO) = ΔH1 + ΔH2 + ΔH3

4. Calculations - Enthalpy of Formation of MgO
Solution Calorimetry
Calculations same as Pre-lab and lecture demo
Application of Hess’s Law to get ΔHof(MgO)
Compare to Literature Value:
Report Due next week