A **manometer** allows you to determine the pressure of a gas sample by using the atmospheric pressure and difference in the height of mercury.

Concept #1: Manometer

In an **open end U-tube manometer** there are two forces acting on the mercury: the outside atmospheric pressure and the pressure of the gas inside the manometer.

Example #1: Manometer

A manometer is attached to a sample of gas that occupies a volume of 2.34 liters. The mercury level in arm of the manometer attached to the gas sample is 24.3 mm lower than that of the arm open to the atmosphere. Atmospheric pressure is measured to be 1.23 atm. What is the pressure of the sample of gas?
A. 23.07 torr
B. 25.53 torr
C. 910.5 torr
D. 934.8 torr
E. 959 torr

The barometeric pressure was 749 mmHg when the open end manometer attached to a flask holding a gas read 13.0 mmHg. (mercury level highest on the side connected to the flask.) What is the pressure of the gas in the flask in kilopascals? 1.00 atm = 101.3 kPa

In diagram a, what is the pressure in the manometer if h = 2.00 cm and the barometric pressure is 780.0 mmHg?
a) 780.0 mmHg
b) 778 mmHg
c) 1.00 atm
d) 1.02 atm
e) 782 mmHg

Given a barometric pressure of75 1.5 mmHg, calculate the pressure of each gas sample as indicated by the manometer.

Given a barometric pressure of75 1.5 mmHg, calculate the pressure of each gas sample as indicated by the manometer.

The atmospheric pressure is 752 mm Hg. What is the pressure (atm) of the enclosed gas when h = 36.0 cm?
a) 1.463 atm
b) 0.9954 atm
c) 1.009 atm
d) 1.271 atm
e) 0.9826 atm

An open-ended mercury manometer is used to measure the pressure exerted by a trapped gas as shown in the figure. Atmospheric pressure is 749 mmHg. What is the pressure of the trapped gas?
a) 292 mmHg
b) 457 mmHg
c) 749 mmHg
d) 1041 mmHg

You may want to reference (Pages 397 - 400)Section 10.2 while completing this problem.If the gas inside the flask is cooled so that its pressure is reduced from 797.3 torr to a value of 715.7 torr what will be the height of the mercury in the open-end arm? (Hint: The sum of the heights in both arms must remain constant regardless of the change in pressure.)

What is a manometer?

Given a barometric pressure of 755.5 mmHg , calculate the pressure of gas sample (a) as indicated by the manometer.

Given a barometric pressure of 755.5 mmHg , calculate the pressure of gas sample (b) as indicated by the manometer.

Given a barometric pressure of 745.5 mmHg , calculate the pressure of gas sample (a) as indicated by the manometer.

Given a barometric pressure of 745.5 mmHg , calculate the pressure of gas sample (b) as indicated by the manometer.

If the atmospheric pressure is 0.980 atm , what is the pressure of the enclosed gas in each of the three cases depicted in the drawing ?What is the pressure of the enclosed gas in (i)? Assume that the gray liquid is mercury.

If the atmospheric pressure is 0.980 atm , what is the pressure of the enclosed gas in each of the three cases depicted in the drawing ?What is the pressure of the enclosed gas in (ii)? Assume that the gray liquid is mercury.

If the atmospheric pressure is 0.980 atm , what is the pressure of the enclosed gas in each of the three cases depicted in the drawing ?What is the pressure of the enclosed gas in (iii)? Assume that the gray liquid is mercury.

An open-end manometer containing mercury is connected to a container of gas, as depicted in Sample Exercise 10.2 in the textbook. What is the pressure of the enclosed gas in torr in each of the following situations?The mercury in the arm attached to the gas is 15.2 cm higher than in the one open to the atmosphere; atmospheric pressure is 0.985 atm .

An open-end manometer containing mercury is connected to a container of gas, as depicted in Sample Exercise 10.2 in the textbook. What is the pressure of the enclosed gas in torr in each of the following situations?The mercury in the arm attached to the gas is 12 mm lower than in the one open to the atmosphere; atmospheric pressure is 0.96 atm .

Suppose that a liquid is 12 times denser than water.If you were to sip this liquid at sea level using a straw, what would be the maximum length of the straw?

In diagram a, what is the pressure in the manometer if h = 2.00 cm and the barometric pressure in 780.0 mmHg?a. 780.0 mmHgb. 778 mmHgc. 1.00 atmd. 1.02 atme. 782 mmHg

What is a manometer? How does it measure the pressure of a sample of gas?

A sealed-tube manometer (as shown below) can be used to measure pressures below atmospheric pressure. The tubeabove the mercury is evacuated. When there is a vacuum in the flask, the mercury levels in both arms of the U-tube are equal. If a gaseous sample is introduced into the flask, the mercury levels are different. The difference h is a measure of the pressure of the gas inside the flask. If h is equal to 6.5 cm, calculate the pressure in the flask in torr, pascals, and atmospheres.

A diagram for an open-tube manometer is shown below.If the flask is open to the atmosphere, the mercury levels are equal. For each of the following situations where a gas is contained in the flask, calculate the pressure in the flask in torr, atmospheres, and pascals.a.

A diagram for an open-tube manometer is shown below.If the flask is open to the atmosphere, the mercury levels are equal. For each of the following situations where a gas is contained in the flask, calculate the pressure in the flask in torr, atmospheres, and pascals.b.

b. What advantage would there be in using a less dense fluid than mercury in a manometer used to measure relatively small differences in pressure?

The pressure of a sample of gas is measured at sea level with a closed-end manometer. The liquid in the manometer is mercury. Determine the pressure of the gas in:(a) torr

The pressure of a sample of gas is measured at sea level with a closed-end manometer. The liquid in the manometer is mercury. Determine the pressure of the gas in:(b) Pa

The pressure of a sample of gas is measured at sea level with a closed-end manometer. The liquid in the manometer is mercury. Determine the pressure of the gas in:(c) bar

The pressure of a sample of gas is measured with an open-end manometer, partially shown to the right. The liquid in the manometer is mercury. Assuming atmospheric pressure is 29.92 in. Hg, determine the pressure of the gas in:(a) torr

The pressure of a sample of gas is measured with an open-end manometer, partially shown to the right. The liquid in the manometer is mercury. Assuming atmospheric pressure is 29.92 in. Hg, determine the pressure of the gas in:(b) Pa

The pressure of a sample of gas is measured with an open-end manometer, partially shown to the right. The liquid in the manometer is mercury. Assuming atmospheric pressure is 29.92 in. Hg, determine the pressure of the gas in:(c) bar

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760.0 mm Hg, determine the pressure of the gas in:(a) mm Hg

On a cool, rainy day, the barometric pressure is 730 mmHg. Calculate the barometric pressure in centimeters of water (cmH2O) (d of Hg = 13.5 g/mL; d of H2O = 1.00 g/mL).

A long glass tube, sealed at one end, has an inner diameter of 10.0 mm. The tube is filled with water and inverted into a pail of water. If the atmospheric pressure is 755 mmHg, how high (in mmH2O) is the column of water in the tube ( d of Hg = 13.5 g/mL; d of H2O = 1.00 g/mL)?

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760.0 mm Hg, determine the pressure of the gas in:(b) atm

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760.0 mm Hg, determine the pressure of the gas in:(c) kPa

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760 mm Hg, determine the pressure of the gas in:(a) mm Hg

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760 mm Hg, determine the pressure of the gas in:(b) atm

The pressure of a sample of gas is measured at sea level with an open-end mercury manometer. Assuming atmospheric pressure is 760 mm Hg, determine the pressure of the gas in:(c) kPa

How would the use of a volatile liquid affect the measurement of a gas using open-ended manometers vs. closed-end manometers?

In an open-ended manometer, the left mercury level (Gas flask side) is 50 mm higher than the right mercury level (Open-end side). What is the gas pressure (in atm) when the air pressure is 750 mmHg. (1 atm = 760 mmHg) (a) 0.987 atm (b) 0.921 atm (c) 1.05 atm (d) None of the above