formation of mgo equation

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As per lab manual we used a calibrated calorimeter (using a rounded end thermometer so as to not puncture a hole in the calorimeter) to determine the heats of reaction for Magnesium (Mg) with Hydrochloric Acid (HCl) and Hydrochloric Acid with Magnesium Oxide (MgO). Mg (s) + 1/2 O 2(g) → MgO (s) ∆H = ∆H˚f (MgO)(2) It is more convenient to use the first law of thermodynamics in the form of Hess's law to simplify the measurement of ∆H˚f (MgO). Since both reactions are in dilute water solutions of HCl it was necessary to know the heat capacity of water, but b… Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to separate moisture. It has an empirical formula of MgO and consists of a lattice of Mg ions and O ions held together by ionic bonding. Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). Then using mathematical formulas we were able to calculate the heat formation of MgO, which is measured in kJ/Mol. MgO(s) + 2 HCl(aq) → MgCl2(aq) + H2O(l) o ΔH2 (experimentally determined) H2(g) + ½ O2(g) → H2O(l) o ΔH3 = -285.8 kJ Using the techniques presented in the CO example above, you can combine these equations to find o ΔHrxn for formation of one mole of MgO(s): Mg(s) + ½ O2(g) → MgO(s) o The enthalpy of formation of MgO is more difficult to measure directly.

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