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<td><img src="http://pages.uoregon.edu/~imamura/102/images/
Kenomore-refrigerator.jpg"></td>
<td><h3>
Outside of the refrigerator, the electrically-run compressor compresses the 
<i><font color=magenta>Freon gas</font></i> (a name which applies to a number
compunds known as <i><font color=magenta>chloroflourocarbons</font><i>), 
increasing the pressure of the gas. As the pressure of the gas 
increases, so does its temperature.
This high-pressure, high-temperature gas enters the coil on the 
outside of the refrigerator. Heat flows from
the high-temperature gas to the lower-temperature room air 
surrounding the coil. This heat loss causes the high-pressure 
gas to condense to liquid giving off
heat to the air in the room behind the refrigerator. 
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Next, the liquid Freon in the external coil passes through an expansion valve 
into a coil inside the insulated compartment of the refrigerator. The 
liquid freon is at a low pressure (as a result of the expansion) 
and is lower in 
temperature (cooler) than the air inside the 
refrigerator.
Heat is then transferred from the air inside the refrigerator to the liquid 
Freon, causing the temperature inside the refrigerator to be decrease. The 
absorbed heat causes the liquid Freon to start to boil.
When all of the Freon changes to gas, the cycle starts over.
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<td><img src="http://pages.uoregon.edu/~imamura/102/images/
refrigerator3D.gif"><p>
<td><img src="http://pages.uoregon.edu/~imamura/102/images/
refrigeration-cycle.gif">
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