Problem: Calculate ΔH°f  (in kilojoules per mole) for benzene. C6H6, from the following data: 2C6H6(l) + 15O2(g) → 12CO2 (g) + 6H2O(l),      ΔH° = -6543.0 kJCO2 (g),                                                             ΔH°      f = -393.5 kJ/molH2O(l),                                                               ΔH°      f = -285.8 kJ/molExpress the enthalpy change in kilojoules per mole to three significant digits. 

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Calculate ΔH°f  (in kilojoules per mole) for benzene. C6H6, from the following data: 

2C6H6(l) + 15O2(g) → 12CO2 (g) + 6H2O(l),      ΔH° = -6543.0 kJ

CO2 (g),                                                             ΔH°      f = -393.5 kJ/mol

H2O(l),                                                               ΔH°      f = -285.8 kJ/mol

Express the enthalpy change in kilojoules per mole to three significant digits. 

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