A manometer was connected to a bulb containing an unknown gas under slight pressure. The gas was allowed to escape through a small pinhole, and the time for the manometer reading to drop from 75 cm to 50 cm was 52 s. When the experiment was repeated using nitrogen (for which M = 28.02 g mol−1) the same fall took place in 42 s. Calculate the molar mass of the unknown gas. Hint: The pressure changes and, as a consequence, so does the rate of effusion; note, however, that the change is the same in both cases.
A manometer was connected to a bulb containing an unknown gas under slight pressure. The gas was allowed to escape through a small pinhole, and the time for the manometer reading to drop from 75 cm to 50 cm was 52 s. When the experiment was repeated using nitrogen (for which M = 28.02 g mol−1) the same fall took place in 42 s. Calculate the molar mass of the unknown gas. Hint: The pressure changes and, as a consequence, so does the rate of effusion; note, however, that the change is the same in both cases.
Chapter9: Energy For Today
Section: Chapter Questions
Problem 9E
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A manometer was connected to a bulb containing an unknown gas under slight pressure. The gas was allowed to escape through a small pinhole, and the time for the manometer reading to drop from 75 cm to 50 cm was 52 s. When the experiment was repeated using nitrogen (for which M = 28.02 g mol−1) the same fall took place in 42 s. Calculate the molar mass of the unknown gas. Hint: The pressure changes and, as a consequence, so does the rate of effusion; note, however, that the change is the same in both cases.
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