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Homework Help: Using ice in the combustion of Paraffin and Methanol

  1. Mar 6, 2010 #1
    1. The problem statement, all variables and given/known data
    During a lab where the heat of combustion of paraffin and methanol was found, ice was used to lower the temperature of water to 10 C, then the water was heated to 30C. This inturn gave us the information to find the molar heat of combustion.

    My question is why was ice used?

    2. Relevant equations

    3. The attempt at a solution
    Since the room temperature was around 20 C, i think it decreased the experimental error because the 10 and 30 degrees average to 20 C.

    Need some help, ty.
  2. jcsd
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