Why is it better to use alcohol instead of mercury in a thermometer?
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ALCOHOL BOILING POINT IS TOO LOWER THAN MERCURY WHICH IS 356.7 °c
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Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Pure ethanol freezes at -115 degrees C, while mercury freezes at -38 degrees C. Thermometers rely upon thermal expansion of the liquid in a bulb at the base of a thin glass tube.
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