Given the bond enthalpies C =C (611) ,C
C (837) ,H-H (436) ,C-H (414) all in kJ/mol,estimate ΔH° for the following reaction:
C2H2(g) + H2(g) → C2H4(g) .
A) -60 kJ/mol
B) -166 kJ/mol
C) -994 kJ/mol
D) +166 kJ/mol
E) 98 kJ/mol
Correct Answer:
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