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Posted by on Sunday, May 8, 2011 at 2:53pm.

Calculate the enthalpy of reaction from the standard enthalpies of formation of the reactant and product molecules.

2C2H6+7O2-->4CO2+6H20

I am using the back of my book for the standard enthalpies of formation, but cannot seem to find the HoF for C2H6?

  • College Chem - , Sunday, May 8, 2011 at 3:45pm

    My book lists -84.86 kJ/mol for the gas.

  • College Chem - , Sunday, June 10, 2012 at 10:21am

    Calculate the enthalpy change for the reaction

    NO(g) + O(g) --> NO2(g)

    from the following data:

    NO(g) + O3(g) --> NO2(g) + O2(g) ; ∆H = -198.9 kJ
    O3(g) --> 1.5O2(g) ; ∆H = -142.3 kJ
    O2(g) --> 2O(g) ; ∆H = 495.0 kJ

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