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: Hess' Law

  1. Feb 8, 2016 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    Hess' Law

    3. The attempt at a solution

    C2H4 (g) + H2O (g) -> C2H5OH (g) ΔH = - 46 kJ
    C2H5OH(g) -> C2H5OH(l) ΔH = - 43 kJ

    I think the ΔH is - 46 - 43 = - 89

    However, the book says that the answer is A. +3 kJ
    How come that be?
  2. jcsd
  3. Feb 8, 2016 #2
    It can't be, that's how. Your answer is right.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted