Using a Barometer to Measure Atmospheric pressure Air pressure is measured by a

Question

Using a Barometer to Measure Atmospheric pressure Air pressure is measured by a barometer. One type of barometer utilizes an evacuated, calibrated tube inverted in a pool of mercury that is open to the atmosphere. As air pressure increases, the mercury will rise in the column until the weight of the mercury in the column equals the force exerted by the air on the surface of the pool. Express your answer in inches of mercury using five significant figures. Beyond measurements in chemistry laboratories, changes in atmospheric pressure are used by meteorologists to aid in the prediction of weather. High pressure areas usually indicate fair weather; low pressure areas are associated with storm systems. At a pressure of 895 mbar, what would the height of the mercury in the column of a mercury barometer? Express your answer numerically in millimeters of mercury.

Explanation / Answer

b) here the pressure is in milli bar

given pressure = 895 m bar

1 bar = 1000 m bar

1 bar = 750.06 mm Hg

895 m bar = 671.30 mm Hg

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