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Energetics of Chemical Reactions 6.14 Using the table of average bond...
For the reaction below: a. Determine whether the reaction is energetically favorable at room temperature. Assume that ΔS...
For the reaction below:
a. Determine whether the reaction is energetically favorable at
room temperature. Assume that ΔS=O. Calculate the gas phase
enthalpy change using bond dissociation enthalpies at 25°C from the
table below. Hint: Be aware that the bond energy for the C-H bond
varies considerably and may change during the reaction; therefore,
you will find several entries for C-H bonds in the table. Include
the algebraic sign and specify units, e.g. -45 kJ/mol. Calculate to
the nearest single...
Using the bond enthalpies in the Average Bond Enthalpies table, determine the approximate enthalpy (in kJ)...
Using the bond enthalpies in
the Average Bond Enthalpies table, determine the approximate
enthalpy (in kJ) for each of the following reactions. (Assume the
average bond enthalpy of the Cl–F bond is 254 kJ/mol.) (a) Cl2(g) +
3 F2(g) → 2 ClF3(g) (b) H2C=CH2(g) + H2(g) → H3CCH3(g) (c) 2
CH3(C=O)H(g) + 5 O2(g) → 4 CO2(g) + 4 H2O(g)
ITITIT Average Bond Enthalpies AH bond (kJ/mol) bond AHond (kJ/mol) bond AH bond (kJ/mol) bond bond AH bond (kJ/mol) С-Н...
C-H Bond H3 C-H 422 372 C2H3-H (H3C)2HC-H (H3C)3C-H CR3-H HC=C-H R = alkyl C-H Bond...
C-H Bond H3 C-H 422 372 C2H3-H (H3C)2HC-H (H3C)3C-H CR3-H HC=C-H R = alkyl C-H Bond Dissociation Enthalpies in kJ/mol BDE (kJ/mol) C-H Bond BDE (kJ/mol) C-H Bond BDE (kJ/mol) 439 RH, C-H HAC-HC-HAC-H | 422 R2HC-H 414 RHC=HC-RHC-H 372 414 H2C=HC-H 464 RHC=RC-RHC-H 372 405 RHC=HC-H 464 R2C=RC-RHC-H 372 405 RAC-HC-H 464 Ar-H 472 556 RC=C-H 556 Ar-H, C-H Ar = aromatic Ar(H3C)HC-H 376 376 Use the above table to estimate the bond dissociation enthalpy (BDE) of each indicated...
Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation Bond 0-H 0-0 kJ. mol 4...
Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation Bond 0-H 0-0 kJ. mol 464 142 351 kJ. mol 890 390 159 CH,() + 4C1,(8) CCI (8) + 4 HCI(g) C-0 The bonding in the molecules is shown. O=0 502 418 C=0 945 730 347 H- Bond CEN N-H N-N N=N N=N F-F CI-CI Br-Br H-H H-F H-CI - Cl C-CI + C CI CCI C-CI 155 HC + H Cl...
The enthalpy change for the following reaction is 95.4 kJ. Using bond energies, estimate the N-H...
The enthalpy change for the following reaction is 95.4 kJ. Using bond energies, estimate the N-H bond energy in N2H4(g). N2(g) + 2H2(g) N2H4(g) kJ/mol The enthalpy change for the following reaction is -92.2 kJ. Using bond energies, estimate the H-H bond energy in H2(g). 2NH3(g) N2(g) + 3H2(g) kJ/mol D Single Bonds Multiple Bonds C N O F Si P S a Br 1 H 436 413 391 463 565 318 322 347 C 413 346 305 358 485...
Use the Bond Energies Table to estimate the enthalpy change in each of the following reactions....
Use the Bond Energies Table to estimate the enthalpy change in each of the following reactions. (Enter your answer to the nearest integer.) (a) CH4(g) C(g) 2 H2(g) 4.0 X kJ/mol (b) ICH3(g) + H20(g) H3COH(g) HI(g) 4.0 X kJ/mol HC CH(g)2 H2(g)H3C-CH 3 (g) (c) 4.0 X kJ/mol
Use the molar bond enthalpy data in the table to estimate the value of AHin for...
Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation Bond O-H 0-0 C-O kJ. mol- 464 142 CH,(8) + 4CI,(8) CCI (B) + 4 HCI(8) Bond CEN N-H N-N NEN kJ. mol-1 890 390 159 418 945 351 The bonding in the molecules is shown. O=0 502 a 730 NEN CC CHCI CH CCI C=0 C-C 347 F-F 155 a CEC - 615 811 414 Ahir J.mol-1 439 C-F C-Cl C-BI...
TABLE 6.1 BOND DISSOCIATION ENERGIES (A) OF COMMON BONDS KJ/MOL KCAL/MOL Bonds to H H2C=CH-CH2 HCC-CH,...
TABLE 6.1 BOND DISSOCIATION ENERGIES (A) OF COMMON BONDS KJ/MOL KCAL/MOL Bonds to H H2C=CH-CH2 HCC-CH, KJ/MOL KCAL/MOL 385 92 489117 HH 435 80 104 104 KJ/MOL KCAL/MOL 444 106 335 285 222 381 91 (CH3)2CH-F (CH) CH-CI (CH3)2CHBr (CH),CH (CH3)2CH-OH H-CH3 H-CH2CH3 HCH(CH3 H- CH3) 435 104 109 Bonds to methyl CH; CHEF CH3-C1 CH3-Br CH3 CH, OH CH I I 356 85 381 91 HC-c-X CHE (CH3)3C-H (CH3),C-F (CH),C-C1 (CH3)2C-Br (CH3), (CH)C-OH 381 444 331 106 111 464...
For the reaction below: CH4 •он CH3 H-OH a. Estimate the gas phase enthalpy change using...
For the reaction below: CH4 •он CH3 H-OH a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the OWL Table Reference, not data from your text. Click the References button and then click the Tables link on the drop-down that appears. Include algebraic sign and units. b. Is the reaction exothermic or endothermic? c. Is the reaction likely to proceed spontaneously in the direction written? For the reaction below: CH4 + Fz CH3-F H/F a. Estimate the...
Bond H-H Predict whether the following reactions will be exothermic or endothermic. Reaction A. N. (9)...
Bond H-H Predict whether the following reactions will be exothermic or endothermic. Reaction A. N. (9) + 3H,9 — 2NH, Reaction B. S(g) +0,2) 0,() Reaction C. 2H,09) — 2H,(g) +0,($) Reaction D. 2F(g) — F, (g) N=N AH° (kJ/mol) 432 942 494 155 0=0 F-F H-N 386 459 H-O S=0 522 Which reaction(s) are endothermic? Which reaction(s) are exothermie? D ID OB Strongest bond Weakest bond Answer Bank Si-F Si-I Si-CI
For the reaction below:
a. Determine whether the reaction is energetically favorable at
room temperature. Assume that ΔS=O. Calculate the gas phase
enthalpy change using bond dissociation enthalpies at 25°C from the
table below. Hint: Be aware that the bond energy for the C-H bond
varies considerably and may change during the reaction; therefore,
you will find several entries for C-H bonds in the table. Include
the algebraic sign and specify units, e.g. -45 kJ/mol. Calculate to
the nearest single...
Using the bond enthalpies in
the Average Bond Enthalpies table, determine the approximate
enthalpy (in kJ) for each of the following reactions. (Assume the
average bond enthalpy of the Cl–F bond is 254 kJ/mol.) (a) Cl2(g) +
3 F2(g) → 2 ClF3(g) (b) H2C=CH2(g) + H2(g) → H3CCH3(g) (c) 2
CH3(C=O)H(g) + 5 O2(g) → 4 CO2(g) + 4 H2O(g)
ITITIT Average Bond Enthalpies AH bond (kJ/mol) bond AHond (kJ/mol) bond AH bond (kJ/mol) bond bond AH bond (kJ/mol) С-Н...
C-H Bond H3 C-H 422 372 C2H3-H (H3C)2HC-H (H3C)3C-H CR3-H HC=C-H R = alkyl C-H Bond Dissociation Enthalpies in kJ/mol BDE (kJ/mol) C-H Bond BDE (kJ/mol) C-H Bond BDE (kJ/mol) 439 RH, C-H HAC-HC-HAC-H | 422 R2HC-H 414 RHC=HC-RHC-H 372 414 H2C=HC-H 464 RHC=RC-RHC-H 372 405 RHC=HC-H 464 R2C=RC-RHC-H 372 405 RAC-HC-H 464 Ar-H 472 556 RC=C-H 556 Ar-H, C-H Ar = aromatic Ar(H3C)HC-H 376 376 Use the above table to estimate the bond dissociation enthalpy (BDE) of each indicated...
Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation Bond 0-H 0-0 kJ. mol 464 142 351 kJ. mol 890 390 159 CH,() + 4C1,(8) CCI (8) + 4 HCI(g) C-0 The bonding in the molecules is shown. O=0 502 418 C=0 945 730 347 H- Bond CEN N-H N-N N=N N=N F-F CI-CI Br-Br H-H H-F H-CI - Cl C-CI + C CI CCI C-CI 155 HC + H Cl...
The enthalpy change for the following reaction is 95.4 kJ. Using bond energies, estimate the N-H bond energy in N2H4(g). N2(g) + 2H2(g) N2H4(g) kJ/mol The enthalpy change for the following reaction is -92.2 kJ. Using bond energies, estimate the H-H bond energy in H2(g). 2NH3(g) N2(g) + 3H2(g) kJ/mol D Single Bonds Multiple Bonds C N O F Si P S a Br 1 H 436 413 391 463 565 318 322 347 C 413 346 305 358 485...
Use the Bond Energies Table to estimate the enthalpy change in each of the following reactions. (Enter your answer to the nearest integer.) (a) CH4(g) C(g) 2 H2(g) 4.0 X kJ/mol (b) ICH3(g) + H20(g) H3COH(g) HI(g) 4.0 X kJ/mol HC CH(g)2 H2(g)H3C-CH 3 (g) (c) 4.0 X kJ/mol
Use the molar bond enthalpy data in the table to estimate the value of AHin for the equation Bond O-H 0-0 C-O kJ. mol- 464 142 CH,(8) + 4CI,(8) CCI (B) + 4 HCI(8) Bond CEN N-H N-N NEN kJ. mol-1 890 390 159 418 945 351 The bonding in the molecules is shown. O=0 502 a 730 NEN CC CHCI CH CCI C=0 C-C 347 F-F 155 a CEC - 615 811 414 Ahir J.mol-1 439 C-F C-Cl C-BI...
TABLE 6.1 BOND DISSOCIATION ENERGIES (A) OF COMMON BONDS KJ/MOL KCAL/MOL Bonds to H H2C=CH-CH2 HCC-CH, KJ/MOL KCAL/MOL 385 92 489117 HH 435 80 104 104 KJ/MOL KCAL/MOL 444 106 335 285 222 381 91 (CH3)2CH-F (CH) CH-CI (CH3)2CHBr (CH),CH (CH3)2CH-OH H-CH3 H-CH2CH3 HCH(CH3 H- CH3) 435 104 109 Bonds to methyl CH; CHEF CH3-C1 CH3-Br CH3 CH, OH CH I I 356 85 381 91 HC-c-X CHE (CH3)3C-H (CH3),C-F (CH),C-C1 (CH3)2C-Br (CH3), (CH)C-OH 381 444 331 106 111 464...
For the reaction below: CH4 •он CH3 H-OH a. Estimate the gas phase enthalpy change using bond dissociation enthalpies from the OWL Table Reference, not data from your text. Click the References button and then click the Tables link on the drop-down that appears. Include algebraic sign and units. b. Is the reaction exothermic or endothermic? c. Is the reaction likely to proceed spontaneously in the direction written? For the reaction below: CH4 + Fz CH3-F H/F a. Estimate the...
Bond H-H Predict whether the following reactions will be exothermic or endothermic. Reaction A. N. (9) + 3H,9 — 2NH, Reaction B. S(g) +0,2) 0,() Reaction C. 2H,09) — 2H,(g) +0,($) Reaction D. 2F(g) — F, (g) N=N AH° (kJ/mol) 432 942 494 155 0=0 F-F H-N 386 459 H-O S=0 522 Which reaction(s) are endothermic? Which reaction(s) are exothermie? D ID OB Strongest bond Weakest bond Answer Bank Si-F Si-I Si-CI
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