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April 20, 2014

Homework Help: College Chemistry

Posted by Mollie on Friday, November 19, 2010 at 1:38pm.

A sample of octane in equilibrium with its vapor in a closed 1.0 L container has a vapor pressure of 50 torr at 45oC. The container’s volume is increased to 2.0 L at constant temperature and equilibrium is re-established. What is the vapor pressure?

The answer I got was 25 torr, but the correct answer is 50 torr. Why would the pressure not half when the volume is doubled?

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