The complete combustion of acetylene (C2H2), the fuel used in acetylene welding torches, produces carbon dioxide gas and water vapor and releases 1256 kJ of heat energy per mole of acetylene.
a. Write out the complete balanced thermochemical equation for this reaction.
b. How much heat in J will be given off by the complete reaction of 25 mL of acetylene? (1 mL = 1 cm3 , density of acetylene = 1.097 g/cm3 )
c. How much acetylene must be burned to produce enough heat to melt 27.5 g of iron? Assume the iron is already at its melting point of 1539°C . (Hfus of Fe is 13.8 kJ/mol)