For a particular isomer of C8H18, the combustion reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standard conditions. C8H18(g)+252O2(g)⟶8CO2(g)+9H2O(g)ΔH ∘rxn=−5113.3 kJ/mol What is the standard enthalpy of formation of this isomer of C8H18(g)? ΔH∘f=

The standard enthalpy of formation of this isomer of is -210.9 kJ

Explanation:

The given balanced chemical reaction is,

First we have to calculate the enthalpy of formation of  .

where,

We are given:

Putting values in above equation, we get:

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fe 55.85 g/mol and h2o 18.02 g/mol.