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The thermochemical equation for the complete combustion of glucose is A - VCE - SSCE Chemistry - Question 2 - 2019 - Paper 1
Question 2
The thermochemical equation for the complete combustion of glucose is A. C6H12O6 + 6O2 → 6CO2 + 6H2O ΔH = -2860 kJ mol⁻¹ B. C6H12O6 + 3O2 → 6CO + 6H2O ΔH = -2011... show full transcript
Worked Solution & Example Answer:The thermochemical equation for the complete combustion of glucose is A - VCE - SSCE Chemistry - Question 2 - 2019 - Paper 1
Step 1
Identify the correct thermochemical equation for the complete combustion of glucose.
Answer
The complete combustion of glucose (C6H12O6) occurs in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). The thermochemical equation that correctly represents this process is:
ightarrow 6CO_2 + 6H_2O$$ with a change in enthalpy of ΔH = -2860 kJ mol⁻¹ (Option A). This indicates an exothermic reaction where energy is released.