Problem: For a particular isomer of C8H18, the following reaction produces 5093.7 kJ of heat per mole of C8H18 (g) consumed, under standard conditions. C8H18 (g) + 25/2O2 (g) → 8CO2 (g)      ΔH°rxn = - 5093.7 kJ What is the standard enthalpy of formation of this isomer of C8H18?

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For a particular isomer of C8H18, the following reaction produces 5093.7 kJ of heat per mole of C8H18 (g) consumed, under standard conditions. 

C8H18 (g) + 25/2O2 (g) → 8CO2 (g)      ΔH°rxn = - 5093.7 kJ 

What is the standard enthalpy of formation of this isomer of C8H18?