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

  • 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.

Still have questions? Get your answers by asking now.