Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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
    and
    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

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    bard, you have to show what you know and have tried, before we can help you.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?