Question

An oxyacetylene torch is a tool that mixes and burns oxygen and acetylene to produce an extremely hot flame. This tool is used to cut steel or weld iron and other metals. The temperature of the film can reach 3480 oC. The burning of acetylene is given by the thermochemical equation:

C2H2 (g) + 3/2 CO2 (g) —> CO2 (g) + H2O (l) ΔH = - 1301.1 kJ

For the reaction,
2CO2 (g) + 2H2O (l) —> 2 C2H2 (g) + 3 CO2 (g)

what is the ΔH for the reaction?

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