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December 20, 2014

Homework Help: Chemistry

Posted by Dana on Tuesday, September 1, 2009 at 10:41pm.

density- 0.818g/mL
boiling point- 78.5 degrees C
heat of vaporization- 210cal/g

a)How much energy, in calories, will be required to evaporate 125.0 mL of ethanol at its boiling point?

b)How long will it take to add this energy, if the rate of heating is 1.24kcal/minute?

Please explain/show work. My lab manual gives no formula or instructions on how to do this. Thanks!

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