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Used in welding metals, the reaction of acetylene with oxygen has deltaH = -1255.5 kJ

C2H2 (g) + 5/2 O2 (g) --> H2O (g) + 2CO2 (g) deltaH = -1255.5 kJ

How much PV work is done (in kilojoules) and what is the value of deltaE (in kilojoules) for the reaction of 6.50g of acetylene at atmospheric pressure if the volume change is -2.80 L?

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