Estimate ΔHrxn for the following chemical reaction using the bond enthalpies in the table found here. Report your answer to zero decimal places in standard notation (i.e. 123. kJ *For numbers ending in zero, be sure to include the decimal!*
Hrxn = Hproducts - H reactants
H0 C2H4 = 52.4 KJ/mole
H0 Cl2 = 0 KJ/mole
H0 C2H4Cl2 = -125.4 KJ/mole
Hrxn = Hproducts - H reactants
Hrxn = -125.4 - (52.4+0) = 73.0 KJ/mole
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