If the pressure in a gas container that is connected to an open-end U-tube manometer is 106 kPa and the pressure of the atmosphere at the open end of the tube is 742 mm Hg,the level of mercury in the tube will be
A)53 mm higher in the arm open to the atmosphere.
B)53 mm higher in the arm connected to the gas cylinder.
C)636 mm higher in the arm open to the atmosphere.
D)636 mm higher in the arm connected to the gas cylinder.

Question

Quizplus · Accepted Answer

The pressure in the gas container is 106 kPa, which is equivalent to 795 mm Hg. The pressure of the atmosphere at the open end of the tube is 742 mm Hg. Therefore, the difference in pressure between the two arms of the manometer is 795 mm Hg - 742 mm Hg = 53 mm Hg. This means that the level of mercury in the tube will be 53 mm higher in the arm open to the atmosphere.

If the Pressure in a Gas Container That Is Connected