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Determining the Enthalpy of a Reaction
Member rating: No Rating | Words: | Submitted: Sun Oct 17 2004
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Corey Cleaver CHE 115-003 Oct. 17th, 2004 TA: Shelly Newman Experiment # 12: Determining the Enthalpy of a Reaction "Calculating Enthalpy and Hess's Law" Introduction: Heat cannot be measured as can mass with a balance or temperature with a thermometer. The change in heat is calculated from the mass, temperature change, and the specific heat of the substance which gains or loses heat. Thus these rules can be applied to acid-base neutralizations, which produce exothermic heat. Combining solutions containing an acid and a base result in two occurrences a rise in the solution's temperature and production of a salt and water. To determine the heat change that occurs as a result of the chemical reaction. The specific heat of the solution, the mass of solution and the temperature change, are all used to calculate the change in enthalpy. Chemists have made great use of the law of Hess in establishing the heats of formation of...
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