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: Internal Energy Change

  1. Mar 21, 2015 #1
    1. The problem statement, all variables and given/known data
    Internal Energy Change

    2. Relevant equations

    3. The attempt at a solution
    If internal energy change equals enthalpy change, then I am looking for the reaction which has the enthalpy change closest to zero. I know it cannot be A, as the formation of water is highly exothermic. I know it cannot be C, as the vaporization of water is highly endothermic. This leaves B and D. I think it should be D, as it is a decomposition. I find that the breaking of bonds of halogens in B to seem endothermic.
  2. jcsd
  3. Mar 21, 2015 #2
    Which reaction has the smallest volume change if carried out at constant temperature and pressure?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted