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?

Prashant Kotian · Accepted Answer

Correct answer: B. Δh = 53.3 - 15.6 = 37.7 cm = 377 mm Hg. Open arm is higher → gas pressure > atmospheric. P_gas = P_atm + Δh = 763 + 377 = 1140 mm Hg = 1140/760 = 1.5 atm.

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