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Unformatted text preview: already been calculated. The first reaction was between magnesium and hydrochloric acid. There was a change in temperature of 6.5 C in this reaction and using this and the equation deltaH=-[qcal+qwater] the enthalpy was calculated. The deltaH was equal to -2.864 KJ. Then the enthalpy was calculated for the reaction between magnesium oxide and hydrochloric acid using the same method. The change in temperature was 6 C and the enthalpy was -2.643 KJ. After the two enthalpies were calculated, using the enthalpy of a third water equation was given(-285.84 KJ). Using the three enthalpies and flipping equations the enthalpy of the reaction Mg+(1/2)O2 MgO was found to be -286.02 KJ. Some possible errors for this experiement could have been misreading of the thermometer in any parts of the experiements. Also wrong weights or volumes of MgO, Mg, and HCl could have changed the final enthalpy values....
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This note was uploaded on 09/07/2010 for the course CHEM 1310 taught by Professor Cox during the Fall '08 term at Georgia Tech.
- Fall '08