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Calculations Lab: Heats of Fusion and Vaporization

  1. Dec 4, 2012 #1
    1. The problem statement, all variables and given/known data

    Hi, I am answering Question #3, and using the formula and variables above scratch area as reference on how to answer the question.

    Could someone please have a look and see if the problem I worked out came out correct.


    2. Relevant equations



    3. The attempt at a solution
    First I converted g = kg
    I used the given variables, then I work out the problem, I made sure to do the paranthesis first before multiplying the variables in,
    then converted back to kg and finally came with the answer

    1827.88 cal/g heat transfer, did i use the correct unit? joules?
    Any input would happily appreciated
    12-04-2012101319PM.jpg
     
    Last edited: Dec 4, 2012
  2. jcsd
  3. Dec 4, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    You're answer is in the right ballpark (but a bit low). You've specified your heats of fusion and vaporization with units of cal/kg, whereas the number magnitudes look like they're more suited to being kcal/kg or cal/g. Check them.

    The final result should have units pertaining to heat only: either Joules or calories.
     
  4. Dec 5, 2012 #3
    ok thanks,
     
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