Question

Use the standard enthalpies of formation for the reactants and products to solve for the ΔHrxn for the following reaction. (The ΔHf of C2H4 is 52.26 kJ/mol, CO2 is -393.509 kJ/mol, and H2O is -241.818 kJ.)

C2H4 (g) + 3O2(g) 2CO2 (g) + 2H2O(g)

ΔHrxn =

The reaction is .

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