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    Energy, q, w, Enthalpy, and Stoichiometry

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    Consider the combustion of liquid methanol,
    CH3OH(l): CH3OH(l) + 3/2O2(g)>> CO2(g)+2H2O(l)ΔH = -726.5kJ

    1)What is the enthalpy change for the reverse reaction?
    Express your answer using four significant figures.

    2)Balance the forward reaction with whole-number coefficients: αCH3OH(l)+βO2(g)>>γCO2(g)+δH2O(l)
    Give your answer as an ordered set of numbers α,β , γ, ... Use the least possible integers for the coefficients.

    3)What is ΔH for the reaction represented by this equation?
    Express your answer using four significant figures.

    4)Which is more likely to be thermodynamically favored, the forward reaction or the reverse reaction?

    5)If the reaction were written to produce H2O(g) instead of H2O(l), would you expect the magnitude of ΔH to increase, decrease, or stay the same?

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    https://brainmass.com/chemistry/stoichiometry-of-combustion/energy-q-w-enthalpy-and-stoichiometry-306971

    Solution Preview

    Energy, q, w, Enthalpy, and Stoichiometry
    Consider the combustion of liquid methanol, CH3OH(l):

    CH3OH(l) + 3/2O2(g)>> CO2(g)+2H2O(l) ΔH = -726.5kJ

    1)What is the enthalpy change for the reverse reaction?
    Express your answer using four significant figures.

    Note: The enthalpy of the reverse reaction has the same magnitude as that of the forward reaction but opposite in sign. Hence, for the reverse reaction, ΔH = +726.5 kJ

    2)Balance the forward reaction with ...

    Solution Summary

    The expert examines energy, q, w, enthalpy and stoichiometry is determined.

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