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Answer to Question #16916 in Inorganic Chemistry for Monikah Farrell

Question #16916
A 1.397 L container of O2 at 773.6 mm Hg was connected to another evacuated container which had a volume of 1.030 L and separated by a valve. What was the final pressure in atmospheres if the valve was opened and the gas allowed to expand into the other container?
Expert's answer
The law of the isothermal process (Boyle):
for a given mass of gas at a constant temperature of product of pressure and volume is constant.
p1V1 = p2V2
773.6 mm Hg * 1.397 L = 1.030L * p2
p2 = 773.6 mm Hg * 1.397 L / 1.030L;
p2 = 1049.24 mm Hg
p2 = 1049.24 mm Hg / 760 mm Hg = 1.38 atmospheres

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