Enthalpy of Hydration

Enthalpy of Hydration - Enthalpy of Hydration Chem 221-61L...

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Enthalpy of Hydration Chem 221-61L Mike Stengel September 16, 2007 Gary Deng Experiment #3 PURPOSE The purpose of this experiment was to determine the enthalpy of hydration of anhydrous magnesium sulfate by constant pressure calorimetry. This quantity was measured by finding the enthalpy of two dissolution reactions and combining those measurements in accordance with Hess’s Law. PROCEDURE The procedure detailed in experiment 3 of the lab manual was followed with one exception [1]. Five grams of magnesium sulfate heptahydrate was used instead of two grams. DATA Fig 1- Calorimeter data for anhydrous magnesium sulfate Fig 2- Calorimeter data for magnesium sulfate heptahydrate y = -0.0008x + 23.537 R 2 = 0.9214 y = 5E-15x + 20.778 R 2 = 1E-14 20 20.5 21 21.5 22 22.5 23 23.5 24 0 500 1000 1500 2000 Time (sec) Temp (C) y = -0.0004x + 20.907 R 2 = 0.7066 y = -0.004x + 21.574 R 2 = 0.4541 20.65 20.7 20.75 20.8 20.85 20.9 20.95 0 50 100 150 200 250 Time (sec) Temp C
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This lab report was uploaded on 04/18/2008 for the course CHEM 221 taught by Professor Crowder during the Fall '08 term at Bucknell.

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Enthalpy of Hydration - Enthalpy of Hydration Chem 221-61L...

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