The heat combustion of acetylene c2h2g at 25degc is -1299, Ask an Expert

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The heat combustion of acetylene, C2H2(g), at 25°C, is -1299 kJ/mol. At this temperature, ?H°f values for CO2(g) and H2O(l) are -393 and -286 kJ/mol, respectively. Calculate ?H°f for acetylene. A) 2376 kJ/mol B) 625 kJ/mol C) 227 kJ/mol D) -625 kJ/mol E) none of these

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