CONSIDERATIONS FOR DISCUSSION AND CONCLUSIONS SECTION As you write your discussion and conclusions paragraphs in your lab notebook, here are some tips and questions you should be answering. (This is in addition to the "Guidelines for a good discussion and conclusion" handout provided to you at your first lab class.) - What are major concepts utilized in this experiment? - What special instrumentation was relevant to the completion of this experiment and why was it used as it pertains to the calculation of heat quantity? - What did we assume about heat lost and the calorimeter that allowed us to determine T ? - From the drawn graphs and our T values, can we determine additional information about heat transfer (exothermic versus endothermic)? - How were the equations used in relation to Hess's law for both Parts I and II to solve for H ? - For Sources of Error: - Part I: The theoretical values for Hfommion0 of MgO is 601.8kJ/mol. - Determine your percentage error for this experiment. - For Part II: Compare the value for Hrextion for Reaction III that you obtained in this experiment with the calculated value of Reaction III using Hess's law. How do these values compare