19. A 70.4-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0°C, is burned in excess oxygen, liberating 4.06 x 10° kJ of heat at constant pressure. What is the identity of the hydrocarbon? Substance AH (kJ/mol) -393.5 CO2(8) H20() -285.8 a. propylene (C3H6, AH°=20.41 kJ/mol) b. propane (C3H8, AH°--104.7 kJ/mol) C. acetylene (C2H2, AH°=226.73 kJ/mol) d. ethylene (C2H4, AH=52.47 kJ/mol) c. ethane (C2H6, AH°=-84.68 kJ/mol)

19. A 70.4-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0°C, is burned in excess oxygen, liberating 4.06 x 10° kJ of heat at constant pressure. What is the identity of the hydrocarbon? Substance AH (kJ/mol) -393.5 CO2(8) H20() -285.8 a. propylene (C3H6, AH°=20.41 kJ/mol) b. propane (C3H8, AH°--104.7 kJ/mol) C. acetylene (C2H2, AH°=226.73 kJ/mol) d. ethylene (C2H4, AH=52.47 kJ/mol) c. ethane (C2H6, AH°=-84.68 kJ/mol)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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