Uses of Gas manometer

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Solution

Dear Student, A manometer is a scientific instrument used to measure gas pressures. Open manometers measure gas pressure relative to atmospheric pressure. A mercury or oil manometer measures gas pressure as the height of a fluid column of mercury or oil that the gas sample supports. Regards

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Similar questions

Q. A manometer is used to measure the pressure of a gas trapped in a cylinder.
At which labelled point on the diagram is the pressure greatest?

Q. A manometer reads the pressure of a gas in an enclosure as shown in Fig (a). When a pump removes some of the gas, the manometer reads as in Fig (b). The liquid used in the manometers is mercury and the atmospheric pressure is

76

c m

of mercury.
(a) Give the absolute and gauge pressure of the gas in the enclosure for cases (a) and (b), in units of

c m

of mercury.
(b) How would the levels change in case (b) if

13.6

c m

of water (immiscible with mercury) are poured into the right limb of the manometer? (Ignore the small change in the volume of the gas).

Q. A open ended mercury manometer is used to measure the pressure exerted by a trapped gas as shown in the figure. Initially manometer shows no difference in mercury level in both columns as shown in figure.
After sparking

A

dissociates according to following reaction

A (g) ⟶ B (g) + 3 C (g)

If pressure of Gas

A

decreases to

0.9 a t m

. Then
(Assume temperature to be constant and is

300 K

)

^{'} A^{'}

dissociates according to following reaction

A (g) \to B (g) + 3 C (g)

If pressure of Gas

" A "

decrease to

0.9

atm. Then:
(Assume temperature to be constant and is

300 K

Open end mercury manometer is connected to a gas chamber containing gas at a pressure of 1.38 bar. The barometric pressure is 750 mm Hg. Mercury level in the arm connected to a gas chamber stands at 11.3 cm. What is the reading in open arm of the manometer?

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