Mercury is used in barometer why?

Question

Mercury is used in barometer why?

Answer 1

Density. If water were used instead, the column would have to be 30 feet high. Another less important reason is that mercury has a lower vapor pressure than, for instance, water

Answer 2

For three reasons: first and foremost because it is a liquid over such a broad range of temperature; secondly because its density makes it suitable for constructing barometers of convenient size (you could use water, for example, but then your barometer would have to be 32 feet tall...); and thirdly because even though it is a liquid it does not adhere to the surface of the glass tube of the barometer (essentially no surface tension, unlike water and other liquids).

Answer 3

It remains liquid over a wide range of temperatures.

Answer 4

actually just because it is a really heavy liquid

you can make a barometer with water, but it ends up being like 30ft tall

because Hg is a metal and liquid, you can condense the size of it down to something you can fit on the wall

Answer 5

The biggest 2 reasons are that it's liquid and it's heavy.  You could make a barometer out of any liquid, but it you made it from water, it would have to be about 30 feet high.  Heavier liquids need a smaller height in order to match atmospheric pressure.  Another advantage is that mercury doesn't evaporate very much.  A water barometer would constantly need refilling.

Answer 6

its cheap

Answer 7

thermometer not barometer.