1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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