Suppose a sample of helium gas at 45.0 °C sealed in a flask at a pressure of 5.63 atm wasfound to be contaminated by water. The gas was filtered through a cartridge containinga desiccant to remove the water and the dried gas was returned to the same flask withthe temperature brought down to 25.0 °C. What was the mole fraction of water in thecontaminated sample if the pressure of the dried gas at 25.0 °C was 5.23 atm?

Answered: Image /qna-images/answer/6fa59e53-b99c-4b2f-89e4-d1574ae68d7c.jpg

Answered: Suppose a sample of helium gas at 45.0…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

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Chapter2: The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 70P: Using a numerical integration method such as Simpson's rule, find the fraction of molecules in a...

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An aluminum rod 0.500 m in length and with a cross-sectional area of 2.50 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at 300 K. (a) If one-half of the rod is inserted into the helium, how many liters of helium boil off by the time the inserted half cools to 4.20 K? Assume the upper half does not yet cool. (b) If the circular surface of the upper end of the rod is maintained at 300 K, what is the approximate boil-off rate of liquid helium in liters per second after the lower half has reached 4.20 K? (Aluminum has thermal conductivity of 3 100 W/m K at 4.20 K; ignore its temperature variation. The density of liquid helium is 125 kg/m3.)
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An aluminum rod 0.500 m in length and with a cross sectional area of 2.50 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at 3(H) K. (a) If one-halt of the rod is inserted into the helium, how many liters of helium boil off by the time the inserted half cools to 4.20 K? Assume the upper half does not yet cool, (b) If the circular surface of the upper end of the rod is maintained at 300 K. what is the approximate boil-off rate of liquid helium in liters per second after the lower half has reached 4.20 K? (Aluminum has thermal conductivity of 3 100 YV/m K at 4.20 K; ignore its temperature variation. The density of liquid helium is 125 kg/m3.)
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In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (−78.5°C) and in boiling pentane (36.1°C). The separate pressures are 0.898 atm and 1.436 atm. Hint: Use the linear relationship P = A + BT, where A and B are constants. (a) What value of absolute zero does the calibration yield? °C(b) What pressure would be found at the freezing point of water? atm(c) What pressure would be found at the boiling point of water? atm
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A gas contained in a container with a volume of 10 L subjected to 1 atm of pressure, if its temperature rises from 34 ºC to 60 ºC in an isochoric process, known its molar specific heat Cv = 2.5 · R (where R = 8.31 J / mol K). Determine H
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