The enthalpy of combustion for octane (C_8 H_18 (I)), a key component of gasoline is -5,...

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Answer 1

Answer #1

for forward reaction :

$\Delta$ Hrxn = -5074 kJ / mol

2 C8H18 + 25 O2 -------------------------> 16 CO2 + 18 H2O , $\Delta$ Hrxn = - 2 x 5074 kJ / mol

= - 10148 kJ / mol

16 CO2 + 18 H2O------------------------->2 C8H18 + 25 O2 , $\Delta$ Hrxn = 10148 kJ

Answer 2

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