How is a column of mercury in a barometer affected when moved to a higher altitude?

Select one:

A. The column of mercury will be greater than 760 mm Hg.

B. The column of mercury will be less than 760 mm Hg.

C. The altitude does not affect air pressure.

D. The column of mercury will be the same because the temperature has not changed.

Question

Chemistry

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11 March, 01:52

How is a column of mercury in a barometer affected when moved to a higher altitude?

Select one:

A. The column of mercury will be greater than 760 mm Hg.

B. The column of mercury will be less than 760 mm Hg.

C. The altitude does not affect air pressure.

D. The column of mercury will be the same because the temperature has not changed.

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Answers (1)

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Aliza Michael · Answer 1

B. The Mercury will be lower because when you go to higher elevation there is less air pressure. Barometers like that work by air pushing down on a pool of mercury which pushes it into a thin tube. The less air pressure, the less force on the Mercury and the less it can climb up the tube.