Use the bond energies provided to estimate ΔrH° for the reaction below. C2H4(g) + H2(g) → C2H6(g) ΔrH° = ?
Bond Bond Energy (kJ mol-1)
C-C 347
C-H 414
C=C 611
C≡C 837
H-H 436
A) -128 kJ mol-1
B) +98 kJ mol-1
C) +700 kJ mol-1
D) -102 kJ mol-1
E) -166 kJ mol-1
Correct Answer:
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