Calorimetry 1: The Enthalpy of Formation of MgO Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Experiments Index ChemLab Home		Applets Enthalpy and Hess's Law Applet This applet will help you combine chemical reactions to find the heat of formation of MgO. Linear Least Squares Applet This applet will plot temperature vs. time data to determine the most accurate value of the final temperature. Technique Links Calorimetry Goals In this experiment you will determine the standard molar enthalpy of formation of magnesium oxide, MgO. This is given the symbol and is the enthalpy change for the reaction Mg(s) + 1/2 O2(g) MgO (s). You will determine the value of for one mole of MgO by using Hess's Law and the enthalpy changes of several other solution reactions that are more easily performed and observed. Having trouble viewing the slideshow? Help is here. Key Questions 1. What assumptions are made in using this series of experiments to find the heat of formation of MgO? 2. What conditions must be the same from one reaction to the next? 3.What chemical equations are used and how are they combined to find the heat of formation for MgO? In answering the last question, you may find it helpful to use the applet Enthalpy and Hess's Law
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