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: Determine the homolytic C-H bond strength in CH3OH employing the following data.

  1. Dec 2, 2008 #1
    DfH (CH3OH) = -201.6 kJ mol-1
    DfH (H) = 218 kJ mol-1
    DfH (HBr) = -36 kJ mol-1
    DfH (Br) = 111.9 kJ mol-1
    CH3OH + Br  CH2OH + HBr k(300K) = 1 x 106 M-1s-1; k(350K) = 4 x 108 M-1s-1
    CH2OH + HBr  CH3OH + Br k(300K) = 1 x 107 M-1s-1; k(350K) = 7.7 x 108 M-1s-1

    Any help would be appreciated, I just can't figure out how to even start this problem. Thanks in advance
     
  2. jcsd
  3. Dec 2, 2008 #2

    GCT

    User Avatar
    Science Advisor
    Homework Helper

    Use the rate data to correlate with the temperature data and find the enthalpy of the reaction for the two equations.

    Write the homolytic dissociation equation. Also clarify the subscripts.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook