Manometer

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

The Manometer

Concept: Manometer

7m

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: Manometer

4m

Manometer Additional Practice Problems

A certain amount of gas is contained in a closed a mercury manometer as shown here. Assuming no other parameters change. would h increase, decrease were increased; (b) the molar mass of the gas were doubled; (c) the temperature of the gas was increased; (e) the mercury in the tube were replaced with a less dense fluid; (f) some gas was added to the vacuum at the top of the right-side tube; (g) a hole was drilled in the top of the right side tube?

                       

Watch Solution

Describe what would happen to the column of mercury in the following manometers when the stopcock is opened.

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution

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

Watch Solution