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Chemistry Homework Help => AP Chemistry => Topic started by: chemrookie on March 10, 2009, 10:29:03 AM

Title: Problem in thermochemistry
Post by: chemrookie on March 10, 2009, 10:29:03 AM
I have a problem I need to get answer to Find the molar enthalpy of vaporization for a substance, given that 3.21 mol of the substance absorbs 28.4 kJ of energy as heat when the substance changes from a liquid to a gas.
Title: Re: Problem in thermochemistry
Post by: Darkminer on November 29, 2009, 01:54:00 AM
Use the equation   [delta]H=[delta]H(sol/ w/e reaction type) x mol(given solute in moles)
                       Simplified:  [delta]H=[delta]H(sol) x mol              sub in value in question then solve for unkown
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