Chemistry / Unit 4 Chem 0657 short lesson, about 20 seconds
The Coffee-Cup Calorimeter
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The idea
A coffee-cup calorimeter is a simple, constant-pressure device that measures heat exchange in a solution from its temperature change.
In practice
A polystyrene-cup calorimeter holding a reacting solution lets a thermometer track the temperature rise or fall as the reaction proceeds.
Where people slip
A coffee-cup calorimeter's imperfect insulation lets some heat escape to the room, giving less accurate values than a sealed instrument.
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