Problem: The hydrocarbons acetylene (C2H2) and benzene (C6H6) have the same empirical formula. Benzene is an "aromatic" hydrocarbon, one that is unusually stable because of its structure.By using the data in Appendix C in the textbook, determine the standard enthalpy change for the reaction 3 C2H2(g) → C6H6(l).

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We are asked to determine the standard enthalpy change for the reaction 3 C2H2(g) → C6H6(l).


ΔH°rxn=ΔH°f, product-ΔH°f,reactant


Note that we need to multiply each ΔH˚ by the stoichiometric coefficient since ΔH˚ is in kJ/mol. 


Balanced reaction : 3 C2H2(g) → C6H6(l)

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Problem Details

The hydrocarbons acetylene (C2H2) and benzene (C6H6) have the same empirical formula. Benzene is an "aromatic" hydrocarbon, one that is unusually stable because of its structure.

By using the data in Appendix C in the textbook, determine the standard enthalpy change for the reaction 3 C2H2(g) → C6H6(l).

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