Question

Why water is not used as a barometric liquid?

Answer 1

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. Abarometer using water, for instance, would need to be 13.6 times taller than a mercurybarometer to obtain the same pressure difference.

Answer 2

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercurybarometer to obtain the same pressure difference.