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Data Logging and Control/Cooling Curve: Difference between revisions
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SimonKnight (talk | contribs) (Created page with "'''Cooling curve''' <center>Temperature sensor</center> <div align="right">Temperature sensor</div> InterfaceCooling substance Computer<div align="right">Insulation</d...") |
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'''Cooling curve''' | '''Cooling curve''' | ||
[[Image:CoolingCurve.png]] | |||
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'''Apparatus''' | '''Apparatus''' | ||
Beaker, test tube, water bath, insulation material for the beaker, stearic acid (or wax; benzophenone), test tube rack, interface, Temperature sensors (not ''First Sense ''types - they might be damaged). | Beaker, test tube, water bath, insulation material for the beaker, stearic acid (or wax; benzophenone), test tube rack, interface, Temperature sensors (not ''First Sense ''types - they might be damaged). | ||
'''Setting up''' | '''Setting up''' | ||
Connect two temperature sensors to sockets 1 and 2 on the interface. | Connect two temperature sensors to sockets 1 and 2 on the interface. | ||
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Some systems recognise the sensors you attach automatically, in others you do this yourself. If the sensors are adjustable, set them on a 0-100 range. | Some systems recognise the sensors you attach automatically, in others you do this yourself. If the sensors are adjustable, set them on a 0-100 range. | ||
'''Recording the data''' | '''Recording the data''' | ||
Remove the tube from the water bath. Place it in a small insulated beaker, partly filled with water. Record for 10 minutes. Stir the stearic acid continuously. | Remove the tube from the water bath. Place it in a small insulated beaker, partly filled with water. Record for 10 minutes. Stir the stearic acid continuously. | ||
'''Using the results''' | '''Using the results''' | ||
* How does the graph show you that the stearic acid is getting cooler? | |||
* What is happening to the water temperature as this occurs? Why is this? | |||
How does the graph show you that the stearic acid is getting cooler? | * What is happening to the stearic acid when the graph is flatter? | ||
* What happening to the water temperature as this occurs? Where does the water gain its heat from? | |||
What is happening to the water temperature as this occurs? Why is this? | |||
What is happening to the stearic acid when the graph is flatter? | |||
What happening to the water temperature as this occurs? Where does the water gain its heat from? | |||
