Why mercury is use instead of water in a thermometer?

Answer 1

when measure a very hot body with water inside the thermometer, the glass will break or the water will evaporate, similarly if we measure a cold body with the water again the water inside will freeze and we wont know thew correct measure

Answer 2

1. Mercury is a metal but it is a liquid in a large range of temperature. 2. Because the variation of the thermal expansion of mercury with the temperature is near linear, mercury is a very suitable liquid for filling thermometers or other measuring instruments. 3. Thermometers with colored alcohol, gallium or gallium alloys, etc. are also known.

Answer 3

Well, mercury can't freeze or evaporate at the temperature recorded on a standard thermometer.

If water were used in a thermometer, we wouldn't be able to record any temperatures below its freezing point (0 degrees Celsius) or above its boiling point (100 degrees Celsius.

Mercury has many unique properties. It is a liquid metal and as a metal it expands when heated. When the mercury is heated it rises in the thermometer. And markings on the glass indicate the temperature.

Water does not do this.

But now in this Digital World mercury has been loosing its importance just because everyone wants to use Digital Technology which provide fast and accurate reading and also safe in use, no doubt mercury provides an accurate reading of temperature but it is not fast and safe as compared to Digital Thermometer.

Answer 4

Mercury has a larger temperature range compared to water, making it more suitable for measuring high and low temperatures accurately. Also, mercury has a high boiling point, which prevents it from vaporizing easily and is less affected by changes in atmospheric pressure. Additionally, mercury does not wet the glass walls of the thermometer, allowing for more accurate temperature readings.

Answer 5

because it is better to measure