CALORIMETRY
Thermochemistry
and the
First Law of Thermodynamics

In this experiment you will measured the heat given off or absorbed by the following processes...

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MEASURING TEMPERATURE

The limiting factor in the accuracy of this experiment will generally be in the measurement of the temperature.

You will use two different methods for measuringTemperature.

A. Precision Thermometer

  • this can be read to 0.05C
  • it is expensive and fragile!

B. Temperature Probe interfaced with a computer

  • Use the program LOGGER-PRO (Vernier Software)
  • Interfaced with a Computer
  • There is a TUTORIAL on using.......... LOGGERPRO

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SOME APPLICATIONS

Cold is a useful aid in reducing swelling in an accident. However carrying ice cubes in a first aid kit has some drawbacks. A practical answer to cold on demand uses endothermic heat of solution. A plastic container containing water in one compartment and a salt such as Ammonium Nitrate in the other is kept separate by a plastic seal. When a coldpack is required the seal is broken and the water and salt mix. The endotherm of solution provides the cooling.

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RWK 1997