CHEM120L Lecture Notes - Lecture 4: Limiting Reagent, Endothermic Process, Strong Electrolyte
5 Oct 2017
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Document Summary
The purpose of this lab is determine the molar enthalpy of neutralization, and to determine the molarity of hydrochloric acid. Chemical reactions may pertain to changes in energy, such that energy can be released or absorbed. When energy is released, it is an exothermic reaction; when energy is absorbed, it is an endothermic reaction. Within this lab, a calorimeter, a device used for measuring heat changes that occur in chemical or physical processes, will be used to determine the change in heat when both a base and an acid are put together. A simple coffee cup calorimeter is used in this experiment. Since the coffee cup calorimeter is not a sealed system, the internal pressure is equal to atmospheric pressure; the internal and external pressures are identical, therefore pressure is constant. The determination of q, the heat of the reaction, will equal to the enthalpy change, h. Strong electrolytes are completely dissociated into ions within solutions.
