Question 3 (20 marks) (a) Naphthalene, $C_{10}H_8$, is a solid aromatic compound often sold as mothballs. The complete combustion of this substance to $H_2O(l)$ and $CO_2(g)$ at 25 $^\circ$C yields 5154 kJ/mol. Write a thermo-chemical equation for the combustion of $C_{10}H_8$. [2]
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Naphthalene $\left(\mathrm{C}_{10} \mathrm{H}_{8}\right)$ is a solid aromatic compound often sold as mothballs. The complete combustion of this substance to yield $\mathrm{CO}_{2}(g)$ and $\mathrm{H}_{2} \mathrm{O}(l)$ at $25^{\circ} \mathrm{C}$ yields $5154 \mathrm{~kJ} / \mathrm{mol}$. (a) Write balanced equations for the formation of naphthalene from the elements and for its combustion. (b) Calculate the standard enthalpy of formation of naphthalene.
Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25°C to 32.33°C. Find ΔErxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in a separate experiment, is 5.11 kJ/°C.
Madhur L.
Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 °C to 32.33 °C. Find ΔErxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in a separate experiment, is 5.11 kJ/°C.
David C.
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