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

Homework Help: Enthalpy Lab!

  1. Jan 5, 2010 #1
    1. The problem statement, all variables and given/known data

    I need to find a theoretical enthalpy for a reaction so that I can find a percent error.
    the reaction is:
    CaCl2+H20 =>Ca)+2HCl
    2. Relevant equations

    delta H=m*c*delta T

    3. The attempt at a solution
    Should I use the enthalpies of formation for each of the products?
     
  2. jcsd
  3. Jan 6, 2010 #2
    According to Hess's law, standard enthalpies of formation will work.
     
  4. Jan 7, 2010 #3
    yeah, Hess's law is the way to go. and have fun with thermochem. it was hell for my class last year. i hope you survive.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook