Question

Why is mercury used as a thermometric liquid? Give three reasons.

Answer 1

Mercury is used as a thermometric liquid because of the following reasons:

1. The heat required for the expansion of mercury is very little, thus the temperature of a body can be easily recorded without changing its temperature.
2. Mercury is having a high boiling point of 357°C, so it can be used to record temperatures as high as 357°C.
3. The freezing point of mercury is -39°C, so it can record temperatures as low as -39°C.
4. Mercury can be easily seen in the capillary tube because of its shining and opaque properties.