Problem 13 Calculate the standard enthalpy of combustion of propane: C3Hg(9) + 502(9) 3CO,(9) + 4H,O0), AH: - ? using Table 9.4 of the average bond enthalpies from your textbook on p.396. Accept the bond kJ enthalpy for O2 molecule as: BE(O=0) = 499 moi: Enter your answer in the box provided with correct %3D units and sig. figs.: The standard enthalpy of combustion of propane is : AH = Answer:

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Calculating Enthalpy question (2nd photo)

Problem 13
Calculate the standard enthalpy of combustion of propane:
C3H3(9) + 502(9)
→ 3CO,(9) + 4H,01),
AH: - ?
using Table 9.4 of the average bond enthalpies from your textbook on p.396. Accept the bond
kJ
enthalpy for O2 molecule as: BE(O=0) = 499 oi: Enter your answer in the box provided with correct
units and sig. figs.:
The standard enthalpy
Answer:
AH =
of combustion
%3D
of propane is
Transcribed Image Text:Problem 13 Calculate the standard enthalpy of combustion of propane: C3H3(9) + 502(9) → 3CO,(9) + 4H,01), AH: - ? using Table 9.4 of the average bond enthalpies from your textbook on p.396. Accept the bond kJ enthalpy for O2 molecule as: BE(O=0) = 499 oi: Enter your answer in the box provided with correct units and sig. figs.: The standard enthalpy Answer: AH = of combustion %3D of propane is
Some Bond Enthalpies of Diatomic Moiecules* and Average Bond
Enthalpies for Bonds in Polyatomic Molecules
Table 9.4
Bond Enthalpy
Bond Enthalpy
(kJ/mol)
Bond
Bond
(kJ/mol)
H-H
436.4
C-I
240
H-N
393
С-Р
263
H-0
460
C-S
255
H-S
368
C=S
477
H-P
326
N--N
193
H-F
568.2
N=N
418
H-CI
431.9
NEN
941.4
H-Br
366,1
N-O
176
298.3
N=O
607
C-H
414
0-0
142
C-C
347
0=0
498.7
CC
620
0-P
502
C=C
812
C-N
O=S
469
276
C=N
P-P
197
615
C=N
P=P
489
891
C-0
S-S
268
351
C=0
S=S
352
745
C=0
F-F
156.9
1076.5
C-F
Cl-CI 242.
Cl-F
C-CI
450
193
C-Br
338
276
Br-Br
192.5
*Bond enthalpies for diatomic molecules (in color) have more sienifi
polyatomic molecules, because the bond enthalni
averaged over many comno
The C0
I-I
151.0
Transcribed Image Text:Some Bond Enthalpies of Diatomic Moiecules* and Average Bond Enthalpies for Bonds in Polyatomic Molecules Table 9.4 Bond Enthalpy Bond Enthalpy (kJ/mol) Bond Bond (kJ/mol) H-H 436.4 C-I 240 H-N 393 С-Р 263 H-0 460 C-S 255 H-S 368 C=S 477 H-P 326 N--N 193 H-F 568.2 N=N 418 H-CI 431.9 NEN 941.4 H-Br 366,1 N-O 176 298.3 N=O 607 C-H 414 0-0 142 C-C 347 0=0 498.7 CC 620 0-P 502 C=C 812 C-N O=S 469 276 C=N P-P 197 615 C=N P=P 489 891 C-0 S-S 268 351 C=0 S=S 352 745 C=0 F-F 156.9 1076.5 C-F Cl-CI 242. Cl-F C-CI 450 193 C-Br 338 276 Br-Br 192.5 *Bond enthalpies for diatomic molecules (in color) have more sienifi polyatomic molecules, because the bond enthalni averaged over many comno The C0 I-I 151.0
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