Chemistry Practice Problems Manometer Practice Problems Solution: A mercury barometer.What happens to h the height o...

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Solution: A mercury barometer.What happens to h the height of the mercury column, if the atmospheric pressure increases?

Problem

A diagram shows a glass tube filled with mercury and inserted into a dish of mercury. Pressure is exerted on the surface of the mercury by the atmosphere and by the mercury in the tube. The mercury in the tube rises to height h; above the mercury in the tube is vacuum.
A mercury barometer.

What happens to h the height of the mercury column, if the atmospheric pressure increases?

Solution

We have to determine what would happen to the height of mercury column if the atmospheric pressure is increased.


A barometer is a device that is used to measure air pressure.

It consists of a tube filled with mercury and placed inverted into a tub or mercury. The pressure exerted on the surface of the mercury supports the mercury column to a particular height.

The pressure is related to the height of the mercury column by this formula:

P = ρgh

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