CHEM120L Lecture Notes - 60 Seconds, Sodium Hydroxide, Nitric Acid
27 Nov 2013
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Document Summary
Calorimetry used to calculate the enthalpy of neutralization reactions. Calorimetry is the science of measuring the change in heat in physical or chemical reactions. This is determined through a device called a calorimeter. A calorimeter is isolated from its surroundings, as to only find out the temperature inside. It works by two chemicals being mixed in the calorimeter, reacting together, and a thermometer being placed beforehand in order to measure the change in heat inside the calorimeter. This is not a sealed system; therefore the internal pressure has to equal the atmospheric pressure. (hansen and russell 2006). If this is the case, the final and initial pressures would have to be the same as well. The symbol, q, represents the gain or loss of heat in a system. Ergo, because the pressures do not change within the reaction, q, and h, which represents the enthalpy change, will be the same (hansen and russell.
