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    1. Chemistry
    2. Physical Chemistry
    3. Energetics and Thermodynamics
    4. 527523

    Gibbs Free Energy For Combustion of Octane

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    Calculate delta G combustion at 25'C of octane, c8H18(l),

    2C8H18(l) + 25 O2(g) -------> 16 CO2(g) + 18 H2O(l)

    Using the following thermodynamic data and that given in textbook.

    For C8H18(l), delta H formation = - 208.4 kJ mol-1 and delta S = 463.71 JK-1 mol-1. Give your answer in kJ mol-1 of C8H18 (l).

    © BrainMass Inc. brainmass.com October 10, 2019, 6:04 am ad1c9bdddf
    https://brainmass.com/chemistry/energetics-and-thermodynamics/gibbs-free-energy-combustion-octane-527523

    Solution Preview

    dH = [(16 x dHf CO2) + (18 x dHf H2O)] - [(2 x dHf C8H18) + (25 x dHf O2)]

    dH = [(16 x -393.5) + ...

    Solution Summary

    The Gibbs free energy for combustion of octane is calculated.

    $2.19