Why are used mercury in thermometer
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Posted by Force Legend Gamer 7 years, 5 months ago
- 2 answers
Yogita Ingle 7 years, 5 months ago
- Mercury has high melting and boiling points making it a liquid over a broad range of temperature.
- Since it is a metal, it has a stable coefficient of expansion hence it expands uniformly and noticeably for a slight change of temperature.
- Mercury is a non sticky viscous metal and hence it makes a clear meniscus, helpful in readings.
- Mercury will not expand when it solidifies hence it doesn’t break the glass tube of the thermometer.
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Sonali Aggarwal 7 years, 5 months ago
Most metals are good conductors of heat and they are solids at room temperature.Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer.
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