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Discussion experiment 2

Discussion experiment 2 - James Riddle Riddle 1 jr39592...

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James Riddle Riddle 1 jr39592 Experiment 2 Desai, K One objective of the experiment was to calculate the enthalpy change of the reaction between aqueous ammonia and aqueous hydrochloric acid using Hess’s Law. Other objectives were to calculate the enthalpy of formation of magnesium oxide using Hess’s Law, use prior knowledge about the summation of reaction heats, and then to compare the experimental enthalpy change with the accepted experimental results. (1) The change of enthalpies of reaction for the first two reactions was found by using the calorimeter equation. The specific heat of water was used for the solution because the solution was made up of mostly water. The final temperature was found by using the y-intercept given by the trend line equation on the graph. Then the two enthalpies of reaction were summed to find the enthalpy of reaction of the third reaction. All three reactions were exothermic. It was observed that the
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