Chemistry, 13.11.2019 00:31 ridzrana02
For a particular isomer of c8h18,c8h18, the combustion reaction produces 5099.5 kj 5099.5 kj of heat per mole of c8h18(g)c8h18(g) consumed, under standard conditions. c8h18(g)+252o2(g)⟶8co2(g)+9h2o(g)δh ∘rxn=−5099.5 kj/mol c8h18(g)+252o2(g)⟶8co2(g)+9h2o(g)δh rxn°=−5099.5 kj/mol what is the standard enthalpy of formation of this isomer of c8h18(g)
Answers: 2
is -222 kJ/mol
![\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f(product)]-\sum [n\times \Delta H^o_f(reactant)]](/tpl/images/0371/3800/45485.png)
![\Delta H^o_{rxn}=[(n_{(CO_2)}\times \Delta H^o_f_{(CO_2)})+(n_{(H_2O)}\times \Delta H^o_f_{(H_2O)})]-[(n_{(C_8H_{18})}\times \Delta H^o_f_{(C_8H_{18})})+(n_{(O_2)}\times \Delta H^o_f_{(O_2)})]](/tpl/images/0371/3800/70c63.png)
![-5099.5=[(8\times -393.5)+(9\times -241.5)]-[(1\times \Delta H^o_f_{(C_8H_{18})}))+(\frac{25}{2}\times 0)]](/tpl/images/0371/3800/1a9fc.png)
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For a particular isomer of c8h18,c8h18, the combustion reaction produces 5099.5 kj 5099.5 kj of heat...
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