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Homework Help: The Enthalpy of MgO(s) + 2HCl(aq)

  1. Apr 8, 2006 #1
    Using Hess's Law in 2 Questions

    Hi, can someone just check my work and see if I did something wrong?
    The answers seems strange.
    Clipboard02.jpg
    Clipboard01.jpg

    And someone tell me where I can get the enthalpy values of molecules?

    Thanks. :smile:
     
    Last edited: Apr 9, 2006
  2. jcsd
  3. Apr 10, 2006 #2
    Please, can someone answer me?
     
  4. Apr 10, 2006 #3
    Looks good, but your second answer should have one more significant figure. Try looking for a table or appendix somewhere in your book to find the standard enthalpies of certain substances. Or you could check out this link:

    http://www.psigate.ac.uk/newsite/reference/chemdata/3.html
     
  5. Apr 10, 2006 #4
    Thank you very much, Ksinclair!
     
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