An oxyacetylene flame is often used in the welding of metals. Estimate the flame temperature produced by the reaction. 2C2H2(g) + 5O2(g) --> 4CO2(g) + 2H2O(g) Assume the heat generated from this reaction is all used to heat the products. (Hint: DeltarH is equal to -2162.2 kj/mol. Look up the heat capacities of the products. Assume the heat capacities are temperature independent)