The heat evolved in the combustion of glucose, is –680 kcal/mol. The mass of produced, when 170 kcal — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

Complete combustion of 1 mole of glucose releases 680 kcal and produces 6 moles of $\text{CO}_2$. 170 kcal represents $170 / 680 = 0.25\text{ moles}$ of glucose combusted, which produces $0.25 \times 6 = 1.5\text{ moles}$ of $\text{CO}_2$. Mass of $\text{CO}_2$ = $1.5 \times 44\text{ g/mol} = 66\text{ g}$.