Chemistry, asked by heeras50931, 1 year ago

Why do we use a column of mercury rather than a column of water to measure pressure?

aroojzahoor605: 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 mercury barometer to obtain the same pressure difference. This is because mercury is 13.6 times more dense than water.

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Answered by javedsaif0

bcz mercury has a high volume expansion value rather than water on a infinite small temperature and pressure..

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mohammedfarhan1441: 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 mercury barometer to obtain the same pressure difference. This is because mercury is 13.6 times more dense than water.

Answered by krishn7485

mercury is the only metal at room temperature and hence used for column

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