4. What is the heat of combustion of liquid benzene according to the reaction: C6Hb (l) 15 / 2O2 (g) \u003d 6CO2 (g) 3H2O (g), if the heats of combustion of the reaction participants are known:
Substance ΔН°С,298, kJ/mol
С6Н6 (l) 3298.4
CO2 (g) 0
H2O (g) 0

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