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Enthalpy Changes () and Hess's Law
Member rating: No Rating | Words: | Submitted: Mon Jun 19 2006
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Enthalpy Changes (?) and Hess's Law Formal Lab Report By: Jennifer Partenio-Thrasher Chemistry 103-Lab November 19, 2002 11:20 am Lab Partner: Bobbi Weber In this lab, we learned to use a calorimeter to analyze enthalpy changes for two separate reactions. We then applied Hess's Law; if two reactions can be added together to get a third reaction then the ? H of the first two reactions can be added together to determine the ? H of the third reactions. We used this law to calculate the enthalpy change for two reactions that we did not directly observe. This experiment also familiarized and made use of the First Law of Thermodynamics and it's applications; specifically how a calorimeter works. In collecting the data for this experiment we will be measuring the heat change when HCl is added to NaOH as well as to NH3 and HC2H302 is added to NaOH utilizing an experimental method called calorimetry. The reaction takes...
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