A manometer is connected to a gas containing bulb. The open arm reads 53.3 cm whereas the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 763 mm mercury, what is the pressure of

Question

A manometer is connected to a gas containing bulb. The open arm reads 53.3 cm whereas the arm connected to the bulb reads 15.6 cm. If the barometric pressure is 763 mm mercury, what is the pressure of gas, in atm?

TestHub · Accepted Answer

The open arm stands higher, so the gas pressure exceeds atmospheric pressure by the level difference. Δ h = 53.3 - 15.6 = 37.7 cm = 377 mm Hg. P gas = 763 + 377 = 1140 mm = 1140/760 = 1.50 atm. Matches (b).

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