Write a balanced reaction for the combustion reaction of ethanol (C2H5OH):
Combustion reaction: a compound reacts with O2(g) and the products are H2O(l) and CO2(g)
C2H5OH(l) + O2(g) → CO2(g) + H2O(l)
If the standard enthalpy of combustion of ethanol (C 2H5OH(l)) at 298 K is −1368 kJ.mol−1, calculate the standard enthalpy of formation of ethanol. The standard enthalpies of formation of carbon dioxide and liquid water are −393.51 and −285.83 kJ.mol−1, respectively.
a. −688.7 kJ.mol−1
b. +688.7 kJ.mol−1
c. −344.3 kJ.mol−1
d. −276.5 kJ.mol−1
e. +276.5 kJ.mol−1
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