A solution of pentane and ethanol CH3CH2OH that is 50.% pentane by mass is boiling at...

A solution of pentane and ethanol CH3CH2OH that is 50.% pentane by mass is boiling at 57.2°C. The vapor is collected and cooled until it condenses to form a new solution.

Calculate the percent by mass of pentane in the new solution. Here's some data you may need:

	normal boiling point	density	vapor pressure at 57.2°C
pentane	36.°C	0.63gmL	1439.torr
ethanol	78.°C	0.79gmL	326.torr

Be sure your answer has the correct number of significant digits.

Note for advanced students: you may assume the solution and vapor above it are ideal.

Expert Solution

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queen_honey_blossom answered 1 year ago

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