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Ethanol, CH;CH,OH, is used as a gasoline additive because it boosts octane ratings. Gasoline that contains ethanol is known as gasohol. Calculate the amount of energy released by burning one gallon of ethanol. The density of ethanol is 0.787 g/mL. 1 gallon = 3.785 L AH°{(CO2(s)) = -393.5 kJ/mol AH°{(H20O() = -285.83 kJ/mol TABLE AVERAGE BOND ENERGIES* Diatomic Molecules (Dissociation Energy of Gaseous Molecules) H-H 435 F-F 155 0-0 495 605 H-F H-CI H-Br H-I 565 CI-CI 240 N=0 N=N C=0 430 Br- Br 190 150 945 1070 365 295 Single Covalent Bonds (Average Values) 345 305 360 C-C Si- Si 225 N-N 160 145 H-C H-N H-O 415 N-O N-F N-CI 390 C-N C-0 Si-F 565 390 310 320 200 Si 0-P 450 335 Si-CI 460 320 320 365 240 285 200 210 C-Si C-P H-Si 300 Si-Br Si-N 0-F 190 220 P-P CI H-P H-S 265 C-S C-F C-CI C-Br C-I 270 Sn-Sn Sn-CI 145 315 P-F 490 0-Br S-0 200 265 H-Te P-CI 320 485 330 275 215 P-Br P-I As-CI 270 185 295 S-F S-S S-CI 285 240 255 Multiple Covalent Bonds (Average Values) C=C N=N 420 C=C 835 615 615 890 C=N C=0 N=0 605 545 515 C=N 750-800* 0=P 575 C=S 0=S *All values are in kilojoules per mole (kl/mol) and are rounded to the nearest 5 kJ/mol. *c=0 bond energy in CO2 x 10 i kJ

Ethanol, CH;CH,OH, is used as a gasoline additive because it boosts octane ratings. Gasoline that contains ethanol is known as gasohol. Calculate the amount of energy released by burning one gallon of ethanol. The density of ethanol is 0.787 g/mL. 1 gallon = 3.785 L AH°{(CO2(s)) = -393.5 kJ/mol AH°{(H20O() = -285.83 kJ/mol TABLE AVERAGE BOND ENERGIES* Diatomic Molecules (Dissociation Energy of Gaseous Molecules) H-H 435 F-F 155 0-0 495 605 H-F H-CI H-Br H-I 565 CI-CI 240 N=0 N=N C=0 430 Br- Br 190 150 945 1070 365 295 Single Covalent Bonds (Average Values) 345 305 360 C-C Si- Si 225 N-N 160 145 H-C H-N H-O 415 N-O N-F N-CI 390 C-N C-0 Si-F 565 390 310 320 200 Si 0-P 450 335 Si-CI 460 320 320 365 240 285 200 210 C-Si C-P H-Si 300 Si-Br Si-N 0-F 190 220 P-P CI H-P H-S 265 C-S C-F C-CI C-Br C-I 270 Sn-Sn Sn-CI 145 315 P-F 490 0-Br S-0 200 265 H-Te P-CI 320 485 330 275 215 P-Br P-I As-CI 270 185 295 S-F S-S S-CI 285 240 255 Multiple Covalent Bonds (Average Values) C=C N=N 420 C=C 835 615 615 890 C=N C=0 N=0 605 545 515 C=N 750-800* 0=P 575 C=S 0=S *All values are in kilojoules per mole (kl/mol) and are rounded to the nearest 5 kJ/mol. *c=0 bond energy in CO2 x 10 i kJ

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.34QP: The equation for the combustion of butane, C4H10, is C4H10(g)+132O2(g)4CO2(g)+5H2O(g) Which one of...
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Ethanol, CH;CH,OH, is used as a gasoline additive because it boosts octane ratings. Gasoline that contains ethanol is known as gasohol. Calculate the amount of energy released by burning one gallon of ethanol. The density of ethanol is 0.787 g/mL. 1 gallon = 3.785 L AH"{(CO2(s)) = -393.5 kJ/mol AH?(H2O() = -285.83 kJ/mol TABLE AVERAGE BOND ENERGIES* Diatomic Molecules (Dissociation Energy of Gaseous Molecules) H-H 435 F-F CI-CI 155 0-0 495 H-F 240 565 430 N=0 N=N C=0 605 H-CI H-Br Br-Br 190 150 945 365 1070 H-I 295 Single Covalent Bonds (Average Values) Si- Si Si-F Si-CI 415 225 H-C H-N C-C C-N C-0 C-Si 345 N-N 160 0-0 145 450 565 390 0-Si 0-P 390 305 360 N-O 200 H-O 460 320 N-F 285 335 H-Si 300 265 Si-Br 310 N-CI P-P P-F P-CI 200 210 0-F 0-CI 0-Br 190 H-P H-S 320 C-P Si-N 320 220 200 365 145 315 C-S 270 Sn-Sn 490 H-Te 240 C-F Sn-CI 320 485 330 275 215 S-0 S-F S-S S-CI 265 C-CI C-Br P-Br P-I 270 285 185 240 C- As-CI 295 255 Multiple Covalent Bonds (Average Values) C=C C=N C=C 615 420 605 545 N=N 835 890 C=N C=0 N=0 750-800* 0=P 0=S 615 C=S 575 515 * All values are in kilojoules per mole (kJ/mol) and are rounded to the nearest 5 kJ/mol. *c=0 bond energy in CO2 x 10 kJ
Transcribed Image Text:Ethanol, CH;CH,OH, is used as a gasoline additive because it boosts octane ratings. Gasoline that contains ethanol is known as gasohol. Calculate the amount of energy released by burning one gallon of ethanol. The density of ethanol is 0.787 g/mL. 1 gallon = 3.785 L AH"{(CO2(s)) = -393.5 kJ/mol AH?(H2O() = -285.83 kJ/mol TABLE AVERAGE BOND ENERGIES* Diatomic Molecules (Dissociation Energy of Gaseous Molecules) H-H 435 F-F CI-CI 155 0-0 495 H-F 240 565 430 N=0 N=N C=0 605 H-CI H-Br Br-Br 190 150 945 365 1070 H-I 295 Single Covalent Bonds (Average Values) Si- Si Si-F Si-CI 415 225 H-C H-N C-C C-N C-0 C-Si 345 N-N 160 0-0 145 450 565 390 0-Si 0-P 390 305 360 N-O 200 H-O 460 320 N-F 285 335 H-Si 300 265 Si-Br 310 N-CI P-P P-F P-CI 200 210 0-F 0-CI 0-Br 190 H-P H-S 320 C-P Si-N 320 220 200 365 145 315 C-S 270 Sn-Sn 490 H-Te 240 C-F Sn-CI 320 485 330 275 215 S-0 S-F S-S S-CI 265 C-CI C-Br P-Br P-I 270 285 185 240 C- As-CI 295 255 Multiple Covalent Bonds (Average Values) C=C C=N C=C 615 420 605 545 N=N 835 890 C=N C=0 N=0 750-800* 0=P 0=S 615 C=S 575 515 * All values are in kilojoules per mole (kJ/mol) and are rounded to the nearest 5 kJ/mol. *c=0 bond energy in CO2 x 10 kJ
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