Hess law and enthalpy change?

. Calculate the enthalpy change, DH4 for the reaction

C + 2H2 + O2 ® CH3OH DH4

using Hess’s Law and the following information.

CH3OH + O2 ® CO2 + 2H2O DH1 = -676 kJ mol-1

C + O2 ® CO2 DH2 = -394 kJ mol-1

H2 + O2 ® H2O DH3 = -242 kJ mol-1

1 Answer

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  • 7 months ago
    Favorite Answer

    Three out of the four equations you show are not balanced, so the enthalpies for those equations are meaningless, and the question cannot be answered.

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