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      12-21-2013, 05:35 AM   #7
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The freezing point of water 0 degrees C is for bulk liquid. The freezing point can be lowered when water takes the form of small droplets (hence stable fog at temperatures as low as -5 C) It is raised slightly in the form of sheets, such as on a road. All this is due to the effects of surface tension on the free energy of the system. (consult p chem book for details).
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