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An equation for the complete combustion of methanol is 2CH₃OH(l) + 3O₂(g) → 2CO₂(g) + 4H₂O(g) ΔH for this equation would be A - VCE - SSCE Chemistry - Question 14 - 2018 - Paper 1
Question 14
An equation for the complete combustion of methanol is 2CH₃OH(l) + 3O₂(g) → 2CO₂(g) + 4H₂O(g) ΔH for this equation would be A. +726 kJ mol⁻¹ B. -726 kJ mol⁻¹ C. +1... show full transcript
Worked Solution & Example Answer:An equation for the complete combustion of methanol is 2CH₃OH(l) + 3O₂(g) → 2CO₂(g) + 4H₂O(g) ΔH for this equation would be A - VCE - SSCE Chemistry - Question 14 - 2018 - Paper 1
Step 1
ΔH for this equation would be
Answer
To determine the value of ΔH for the complete combustion of methanol, we recall that the combustion reaction is exothermic, meaning it releases energy. The provided options include both positive and negative values. In combustion reactions, the enthalpy change (ΔH) is typically negative, as heat is released.
Thus, the correct answer is D. -1452 kJ mol⁻¹. This value indicates that the combustion of methanol releases a significant amount of energy.