Explore BrainMass

Explore BrainMass

    Average Bond Energies and Delta H.

    Not what you're looking for? Search our solutions OR ask your own Custom question.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    My text gives the example of the following reaction:

    H2(g) + Cl2(g)-->2HCl(g) / 2 moles HCl

    To break bond
    1 mole H-H bonds x 432 kJ/mol = 432 kJ
    1 mole Cl-Cl bonds x 240 kJ/mole = 240 kJ
    432 + 240 = 672 kJ

    Energy released / bond making
    2 mol H-CL bonds x 428 = 856 kJ

    bond breaking +672
    bond making -856
    net change = -184 KJ/2 moles of HFL = 92 kJ/mol HCL = exothermic

    I understand this when it is 1:1 (H-H), but how is a problem such as:
    H-S-H + Cl-Cl --> Cl-S-Cl + H-H approached?

    © BrainMass Inc. brainmass.com December 24, 2021, 7:44 pm ad1c9bdddf
    https://brainmass.com/chemistry/bonding/average-bond-energies-delta-h-example-problem-214626

    Solution Preview

    H-S-H + Cl-Cl --> Cl-S-Cl + H-H

    For such type of problem, you need to look into how many individual bond as well as type of bonds ...

    Solution Summary

    Stepwise solution to find heat of reaction using bond energy values.

    $2.49

    ADVERTISEMENT