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A manometer is connected to a gas contai...

A manometer is connected to a gas containing bulb The open arm reads `43.7 cm` where as the arm connected to the bulb reads `15.6 cm` If the barometric pressure is 743mm mercury What is the pressure of gas in bar ? .

Text Solution

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Difference of mercury levels in the two arms `=43.7-15.6 cm=28.1" cm"`
As level in the limb connected to the gas bulb is lower than that of open limb, this means pressure of gas is more than the atmospheric pressure.
`:. `Pressure of the gas in the bulb =Barometric pressure+Difference of mercury levels
=74.3 cm +28.1 cm=102.4 cm
`=(102.4)/(76)atm=(102.4)/(76)xx1.01325" bar"=1.365 " bar "`
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