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Unformatted text preview: density of the pure water is 1.00 g/mL and the temperature change has no effect on it. The specific heat capacity of pure water is 4.184 J/g·K) (5 points) Question # 4 The standard molar enthalpy of formation of benzene, C 6 H 6 (g), cannot be determined directly because the compound cannot be prepared by the reaction of carbon and hydrogen. It can by calculated from other enthalpy changes, however. The following enthalpy changes can be measured: Equation 1: C(s) + O 2 (g) CO 2 (g) Δ H° rxn = -393.5 kJ Equation 2: 2H 2 (g) + O 2 (g) 2H 2 O (l) Δ H° rxn = -571.6 kJ Equation 3: 2C 6 H 6 (g) + 15O 2 (g) 12CO 2 (g) + 6H 2 O (l) Δ H° rxn = -6534.7 kJ Please use these energies to obtain the Δ H° f of benzene. (5 points)...
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This note was uploaded on 04/24/2008 for the course CHM 2045 taught by Professor Mitchell during the Spring '07 term at University of Florida.
- Spring '07