For the reaction shown below complete the following calculations.

H2(g) + C2H4(g) --> C2H6(g)

(a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4.

(b) Calculate the enthalpy of reaction, using standard enthalpies of formation. (ΔHｰf for H2, C2H4, and C2H6 are 0, 52.3 kJ/mol, and -84.7 kJ/mol, respectively.)

I'm not sure how to calculate this. I added the bond energies together from the left side, but wasn't sure if I even did that right

H2(g) + C2H4(g) --> C2H6(g)

(a) Estimate the enthalpy of reaction using the bond energy values in Table 9.4.

(b) Calculate the enthalpy of reaction, using standard enthalpies of formation. (ΔHｰf for H2, C2H4, and C2H6 are 0, 52.3 kJ/mol, and -84.7 kJ/mol, respectively.)

I'm not sure how to calculate this. I added the bond energies together from the left side, but wasn't sure if I even did that right

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