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OpenStudy (anonymous):
given 1. 2C2H2(g)+5O2(g)---->4CO2(g)+2H2O(l) delta H=-2600kj 2.2C6H6(l)+15O2(g)---> 12CO2(g)+6H2O(l) delta H=-6536 kj Use Hess's Law to calculate delta H for C6H6(l)--->3C2H2
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