Lab Partners: Sung Jin Kim
3rd March 2012
Lab 7: Deducing Enthalpy if Combustion of Magnesium Oxide with Hess’s Law
Background: Hess’s law enables us to determine enthalpy of a reaction. It states that the enthalpy of a reaction is independent of the route taken to yield the products. Therefore, through this, it is possible for us to obtain enthalpies of reaction, which are otherwise difficult to measure by using the enthalpies of reactions.
Aim/ Purpose: To deduce the enthalpy of the oxidation of Magnesium by means of Hess’s law and the measured enthalpy’s of reaction of Magnesium with Hydrochloric acid, and reaction of Magnesium Oxide with Hydrochloric acid and the formation of water.
Hypothesis: A prediction was made that the value of reaction enthalpy of oxidization of Magnesium would be approximately -601.8 KJ/ mol, which is the accepted value. (Source of accepted value of oxidization of Magnesium: IUPAC)