CHEM 1127Q Lecture Notes - Lecture 21: Calorimeter, Coffee Cup, Heat Capacity
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Made out of two styrofoam coffee cups. Works well for analyzing the heat of an object or reactions in aqueous solution. Assumptions: coffee-cup calorimeter, heat of an object: all of the heat evolved or absorbed by the object is absorbed or lost by the water, the amount of heat absorbed or lost by the calorimeter itself is negligible. Assumptions: coffee-cup calorimeter,reactions in aqueous solution: all of the heat produced or consumed by the reaction is absorbed by or lost from the solution. 2) the specific heat capacity of the solution is that of liquid water (4. 184 j/g . C): the amount of heat absorbed or lost by the calorimeter itself is negligible. The reaction is run in a bomb - a container with heavy, sturdy walls. The bomb is submerged in water and kept in an insulated outer container. The bomb calorimeter is essential when the reaction either: produces large amounts of heat, involves gases.
