Answer:
C8H18(l) + 12.5O2(g)-------------------------> 8CO2(g) + 9H2O(g)
Explanation:
The enthalpy of combustion for octane (C8H18(l)), a key component of gasoline, is -5,074 kJ/mol. This value is the Hrxn for which of the following reactions? 2C8H18(l) + 25O2(g) 16CO2(g) + 18H2O(g) C8H18(l) + 12.5O2(g) 8CO2(g) + 9H2O(g) 16CO2(g) + 18H2O(g) 2C8H18(l) + 25O2(g) 8CO2(g) + 9H2O(g) C8H18(l) + 12.5O2(g)
Enthalpy of combustion signifies a reaction where one mole of the compound completely combines with oxygen gas.
Enthalpy of combustion is the sum of enthalpy of formation on the product sides minus sum of enthalpy of the reaction on the reactant side. When the enthalpy of combustion is negative, then the reaction is exothermic(heat is given to the surrounding)
answer is
C8H18(l) + 12.5O2(g)-------------------------> 8CO2(g) + 9H2O(g)
The reaction that represents the value of Hrxn to be -5,074 kJ/mol is:
C₈H₁₈(l) + 12.5 O₂(g)--------> 8CO₂(g) + 9H₂O(g)
Enthalpy of combustion signifies a reaction where one mole of the compound completely combines with oxygen gas.
The enthalpy of combustion for octane C₈H₁₈(l) , a key component of gasoline, is -5,074 kJ/mol. Enthalpy of combustion is the sum of enthalpy of formation on the product sides minus sum of enthalpy of the reaction on the reactant side. When the enthalpy of combustion is negative, then the reaction is exothermic(heat is given to the surrounding)
Thus, the reaction that represents the value of Hrxn to be -5,074 kJ/mol is:
C₈H₁₈(l) + 12.5 O₂(g)--------> 8CO₂(g) + 9H₂O(g)
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