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Unformatted text preview: (a) Write the reaction for breaking all the bonds in C 6 H 6 ( g ), and use the following data to determine the standard enthalpy change for this reaction: ∆ H ° f [H( g )] = 217.94 kJ/mol ; ∆ H ° f [C( g )] = 718.4 kJ/mol ; ∆ H ° f [C 6 H 6 ( g )] = 82.9 kJ/mol. (b) Write a reaction that corresponds to breaking all the carbon-carbon bonds (NOT the carbon-hydrogen bonds) in C 6 H 6 ( g ). (c) By combining the reactions given in (a) and (b) and using the average bond enthalpy for C–H ( D (C–H) = 413 kJ/mol), calculate the average bond enthalpy for the carbon-carbon bonds in C 6 H 6 ( g ). (d) Compare your answer for part (c) to the values for C–C single (348 kJ/mol) and C=C double (614 kJ/mol) bonds....
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This note was uploaded on 01/11/2011 for the course BCH 1049 taught by Professor Michaelcwchan during the Spring '06 term at City University of Hong Kong.
- Spring '06