Chemistry Calorimetry Solution: Mothballs are composed primarily of the hydrocarbo...

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Solution: 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.

Problem

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.

Solution

Recall: The change in internal energy (ΔE) is given by:

A bomb calorimeter measures heat at constant volume. At constant volume, w = 0 which means:

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Solved • Wed Oct 31 2018 12:46:38 GMT-0400 (EDT)