6 - AP Physics Lab Experimental Determination of Absolute...

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AP Physics Lab Brockport High School NY USA Experimental Determination of Absolute Zero Mr Keefer Introduction Under most conditions of constant pressure, Charles's Law states that the volume of a gas is proportional to the absolute temperature of the gas. Thus, as the average kinetic energy of the gas molecules approaches zero, the volume of the gas also approaches zero. However, real gases liquefy at various temperatures as they approach absolute zero because of van der Waals forces, and they occupy a specific volume, thus acting radically different from ideal gases. In this experiment a volume of air is cooled and a graph of the temperature and volume relationship is plotted. From an extrapolation of the graph to zero volume, the temperature, in degrees Celsius, at which the average kinetic energy of the air molecules is zero can be predicted. This temperature is absolute zero , or 0 K. Materials
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6 - AP Physics Lab Experimental Determination of Absolute...

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