Bond Dissociation Bond Dissociation Enthalpy kJ (kcal)/mol Bond Enthalpy kJ (kcal)/mol Bond H-H 435 (104) C-I 238 (57) O-H 439 (105) C-Si 301 (72) C-H(-CH,) 422 (101) C=C 727 (174) C-H(-CH,) 464 (111) C-0 (aldehyde) 728 (174) C-H(=CH) 556 (133) C=0 (CO,) 803 (192) 1075 (257) 950 (227) N-H 391 (93) Si-H 318 (76) NEN C-C 378 (90) C=C 966 (231) C-N 355 (85) 498 (119) C-O 385 (92)

Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
ChapterL2: Mass Spectrometry
Section: Chapter Questions
Problem 20CTQ
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Using the table of average bond dissociation enthalpies at 25°C, determine which
of the following reactions are energetically favorable at room temperature. Assume that ▲S = 0.

Q.CH2=CH2 + CH4 --> CH3CH2CH3

Bond Dissociation
Bond Dissociation
Enthalpy kJ (kcal)/mol
Bond
Enthalpy kJ (kcal)/mol
Bond
H-H
435 (104)
C-I
238 (57)
O-H
439 (105)
C-Si
301 (72)
C-H(-CH,)
422 (101)
C=C
727 (174)
C-H(-CH,)
464 (111)
C-0 (aldehyde)
728 (174)
C-H(=CH)
556 (133)
C=0 (CO,)
803 (192)
1075 (257)
950 (227)
N-H
391 (93)
Si-H
318 (76)
NEN
C-C
378 (90)
C=C
966 (231)
C-N
355 (85)
498 (119)
C-O
385 (92)
Transcribed Image Text:Bond Dissociation Bond Dissociation Enthalpy kJ (kcal)/mol Bond Enthalpy kJ (kcal)/mol Bond H-H 435 (104) C-I 238 (57) O-H 439 (105) C-Si 301 (72) C-H(-CH,) 422 (101) C=C 727 (174) C-H(-CH,) 464 (111) C-0 (aldehyde) 728 (174) C-H(=CH) 556 (133) C=0 (CO,) 803 (192) 1075 (257) 950 (227) N-H 391 (93) Si-H 318 (76) NEN C-C 378 (90) C=C 966 (231) C-N 355 (85) 498 (119) C-O 385 (92)
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