Practice: Hess Cycles Using Reaction Energies

Using the data below, calculate, to 4 significant figures, the standard molar enthalpy of combustion of ethanol.

SubstanceHO()2gCHOH()25lCO()2g
Δ𝐻⦵f(kJ/mol)−241.82−277.6−393.51
kJ/mol

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