5.
Under what conditions is it better to
use alcohol instead of mercury in a
thermometer?
Answers
Answer:
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
Explanation:
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Answer:
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☜☆.Advantages of using alcohol over mercury as thermometric liquid are:
i) Alcohol has greater value of temperature coefficient of expansion than mercury
.ii) it's freezing point is below –100°C.
Thus, alcohol thermometer is more sensitive than mercury thermometer and can be used to measure the temperature below –40°C.☆☞
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