Liquid ethanol burns in oxygen to form gaseous carbon dioxide and gaseous water.
Substance H∘(kJ/mol)
S∘(J/(mol⋅K))
C2H5OH(l)
−
277.6 160.7
O2(g)
0 205.2
CO2(g)
−
393.5 213.8
CO2(aq)
−
413.8 117.6
H2O(g)
−
241.8 188.8
H2O(l)
−
187.8 70.0
Calculate ΔH∘rxn at 25 ∘C .