What is ΔH°_rxn for the following reaction? 2C₈H₁₈(l) + 17O₂(g) → 16CO(g) + 18H₂O(l)
2C₈H₁₈(l) + 25O₂(g) → 16CO₂(g) + 18H₂O(l) ΔH°_rxn = -11020. kJ/mol
2CO(g) + O₂(g) → 2CO₂(g) ΔH°_rxn = -566.0 kJ/mol

Question

Quizplus · Accepted Answer

To find the ΔH°rxn for the first reaction, we can use the given reactions. The second reaction is directly used in the first reaction, but the third reaction needs to be reversed and multiplied by 8 to match the first reaction's products and reactants. Reversing the third reaction changes the sign of ΔH°rxn, making it +566.0 kJ/mol, and multiplying by 8 gives +4528 kJ/mol. Adding this to the ΔH°rxn of the second reaction (-11020 kJ/mol) gives -6492 kJ/mol.

What Is ΔH°rxn for the Following Reaction? 2C8H18(l) + 17O2(g)

What Is ΔH°_rxn for the Following Reaction? 2C₈H₁₈(l) + 17O₂(g)