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Calculate delta h of this eq

  1. Jan 16, 2005 #1
    calculate delta h of this eq
    2N2 + 5o2 -> 2N2O5
    giventhis data
    h2 + 1/2o2 -> h20
    and delta h of that is -285.5
    n2o5 + h2o -> 2nho3 delta h -76.5
    1/2n2 + 3/2 o2 + 1/2h2 -> hno3 delta h -170.3
  2. jcsd
  3. Jan 16, 2005 #2
    Are you familiar with Hess's Law? Rearrange the bottom 3 equations by modifying them and combining them to make it look like the unknown.
  4. Jan 16, 2005 #3


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    bard, you have to show what you know and have tried, before we can help you.
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