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For a particular isomer of C8H18, the combustion reaction produces 5104.1 kJ of heat per mole of C8H18(g) consumed, under standard conditions. C8H18(g)+(25/2)O2(g)⟶8CO2(g)+9H2O(g) Δ𝐻∘rxn=−5104.1 kJ/mol What is the standard enthalpy of formation of this isomer of C8H18(g)?