The standard enthalpy change of combustion [to CO2(g) and H2O()] at 25°C of the organic solid...

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The standard enthalpy change of combustion [to CO2(g) and H2O()] at 25°C of the organic solid...

The standard enthalpy change of combustion [to CO2(g) and H2O()] at 25°C of the organic solid para-benzoquinone, C6H4O2(s), is determined to be -2767.0 kJ mol-1. What is the Hf° of C6H4O2(s) based on this value?

Use the following data: Hf° H2O () = -285.83 kJ mol-1 ; Hf° CO2(g) = -393.51 kJ mol-1 kJ mol-1

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Answer 1

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602 6 Co2 + 2 h20 + 87-3931) 2 (-2es 3) -2767- kJ 165.72

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