We're asked to calculate an approximate ΔHo (in kilojoules) for the reaction of ethylene with hydrogen to yield ethane:
H2C=CH2(g) + H2(g) → CH3CH3(g)
Recall that we can solve for the ΔH°rxn using bond energies, using the equation:
To do that, we need to do these steps:
Step 1: Draw the Lewis structure of each compound and determine the type of bonds present
Step 2: Solve for ΔH°rxn using the given bond energies
Use the bond dissociation energies Table 7.1 to calculate an approximate ΔH o (in kilojoules) for the reaction of ethylene with hydrogen to yield ethane.
H2C=CH2(g)+H2(g) → CH3CH3(g)
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