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Homework Help: Caloric content of wine

  1. May 14, 2009 #1
    1. The problem statement, all variables and given/known data
    The heat of combustion of ethanol,C2H5OH(l}, is -1367kJ/mol. A batch of Sauvignon Blanc wine contains 10.6% ethanol by mass.

    Assuming the density of the wine to be 1.0g/mL, what caloric content does the alcohol (ethanol) in a 6-oz glass of wine (177 mL) have?


    2. Relevant equations
    1 J = 4.184 Cal


    3. The attempt at a solution
    (177).106 = 18.762g of ethanol
    Molecular weight of ethanol = 46.06844 g/mol
    18.762/46.06844 = 0.40726 = mol
    .40726 * -1367 * 1000 = -556729 J
    -556729*4.184 = -2329355 Cal
     
  2. jcsd
  3. May 14, 2009 #2

    Borek

    User Avatar

    Staff: Mentor

    Check your units.
     
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