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=
Answers: 3
is -210.9 kJ
.
![\Delta H^o=[n_{CO_2}\times \Delta H_f^0_{(CO_2)}+n_{H_2O}\times \Delta H_f^0_{(H_2O)}]-[n_{O_2}\times \Delta H_f^0_{(O_2)+n_{C_8H_{18}}\times \Delta H_f^0_{(C_8H_{18})}]](/tpl/images/0561/1035/28ca9.png)
![-511.3kJ/mol=[(8\times -393.5)+(9\times -241.8)]-[(\frac{25}{2}\times 0)+(1\times \Delta H_f^0_{(C_8H_{18})}](/tpl/images/0561/1035/6b6c5.png)
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For a particular isomer of C8H18, the combustion reaction produces 5113.3 kJ of heat per mole of C8H...
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