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The combustion of ethene (C2H4) is shown below. C2H4 (g) + 3 O2 (g) -> 2 CO2 (g) + 2H2O (g) rH = -1323.1 kj/mol. calculate the standard enthalpy formation fH for C2H4 based on rH and the values in the table Can u show me how to solve this