An open-end manometer containing mercury is connected to a container of gas, as

Question

An open-end manometer containing mercury is connected to a container of gas, as depicted in Sample Exercise 10.2.What is the pressure of the enclosed gas in torr in each of the following situations? show how you got these answers (a) The mercury in the arm attached to the gas is15.4 mm higher than in the one open to the atmosphere; atmosphericpressure is 0.985 atm. (b) The mercury in the arm attached to the gas is 12.3 mm lower than in the one open to the atmosphere; atmospheric pressure is 0.99 atm.

Explanation / Answer

1) 1 atm = 760 torr 1 atm = 760 mm HgSince mercury in the arm attached to the gas is higher, thegas has lower pressure compared to the atmosphere.Pressure of atmosphere = 0.967 atm * (760 mm Hg /1 atm) = 734.9 mm HgPressure of gas = Pressure of atmosphere - h = 734.9 mm - 14.5 cm* (10 mm / 1 cm) = 589.9 mm Hg *( 1 torr / 1 mm Hg) = 589.9 or 590.torr.2)Since mercury in the arm is lower, the pressur

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