J

Why is mercury used in thermometers?

9 Answers
why is mercury used in thermometers?, urgent please. thanks in advance
C

Mercury is used in thermometers because of its high quantity of expansion, it's boiling point is high and this makes it suitable to measure high temperatures.
Mercury is the poorest conductor of heat, but it is still the best suited for use in thermometers. It is the only metal that is in liquid state at room temperature. It won't stick to glass surfaces and its glossy color makes it easily visible.

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A

Mercury is used in thermometers because it is liquid at room temperature, and expands when heated. This expansion is what indicates someone or something's temperature. The hotter the bulb gets, the more volume the liquid will take up, indicating a higher temperature. However, mercury is poisonous and should not be handled, shouldte thermometer break.

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T

It isn't used quite so much anymore as it's highly toxic. However it was used because as a liquid it would contract at lower temperatures and expand, i.e go up the column, at higher temperatures. Water can't be used because while it contracts at lower temperatures, once it gets to around 4C it begins to expand again as it turns to ice.

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I

The expansion of Mercury is nearly linear across the scale where temperatures are typically measured. This means that the volume of mercury will change by very nearly the same amount at cold temperatures, and hot temperatures alike, making for an accurate thermometer.

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H

Mercury is used in thermometers because though it is colorless it can be colored or be made opaque,it does not stick on the walls of the glass, it has got a high melting and boiling point,it is a good conductor of heat and it has got a uniform linear expansion .

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R

mercury has a relatively large and equal expansion when the temperature rises( high coefficient of expansion).
and its coefficient of thermal expansion is fairly uniform.

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E

Mercury is used in thermometers because mercury is the only metal that is liquid at room temperature and liquids expand a lot more than solids when they are heated.

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S

Because it is a metal that acts as a liquid at room temperature.

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B

It's a liquid at room temp and it expands when heated.

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