Use the table of bond dissociation energies to calculate and compare the enthalpy of monobromination and monochlorination for the given alkyl position.
Use the table of bond dissociation energies to calculate and compare the enthalpy of monobromination and...
8.10 Explain the value of bond dissociation energies and use bond dissociation energies in calculations 1. Explain how bond dissociation energies are used to determine the enthalpy change in a reaction. 2. Understand the limitations of using average bond dissociation energy values. 3. Calculate reaction enthalpies from bond dissociation energies
Alkane halogenation is a two-step reaction, as shown below. Using the table of bond dissociation energies, calculate the enthalpy of each step and the enthalpy of the overall reaction. Bond Dissociation Energies (for A-B rightarrow A middot + middot B)
H2C=CH2 + CI H2C=CH + HCI Use the table of bond dissociation energies above to calculate AH for this reaction, the first step in the free radical chlorination of ethene. Table of Bond Dissociation Enthalpies Bond BDE (kJ/mol) H2C=CH-H 464 H-I 297 H-Br 368 H-C1 431 H-F 568 ΔΗ: kJ/mol This reaction is:
7. Calculate the AHRxn for the following transformation. A table of bond dissociation energies is provided below. All work must be shown for partial credit. (8 pts.) hv Br + Br-Br + HBr: Table of Selected Homolytic Bond Dissociation Energies. Bond Broken (CH3)3C-H (CH3)2CH-H Br-Br H-Br CH3CH2-H (CH3)3C-Br (CH3)2CH-Br CH3CH2-Br kJ/mol 400 413 193 366 421 292 298 295
Use average bond energies (table in the hint) to compare the combustion energies of ethane, ethylene, and acetylene. Calculate which of these hydrocarbons releases the most energy per gram.
Calculate the enthalpy for the reaction below using the following bond dissociation energies. • H-H 436 kJ/mol O-H 460 kJ/mol 0-0 180 kJ/mol • 0=0 498 kJ/mol H -774 kJ/mol -654 kJ/mol 654 kJ/mol 774 kJ/mol
13. (12 pts) Using the following bond dissociation energies, estimate the enthalpy of the reaction for the reaction between acetylene and hydroiodic acid to generate 1,2-diiodoethane. нн H-CEC-H 2 H- Bond Bond Enthalpy (kJ/mol) Bond Bond Enthalpy (kJ/mol) 839 C-H 413 С-С сс 348 C-I 240 Н-1 299 7
(2) Using the bond dissociation energies given below, calculate the ΔΗ' for the following reaction. Show your work on your answer sheet. Br +Br Bond Dissociation Energies (BDEs)
Use the bond dissociation energies listed below to calculate the Delta H degree for the halogenations of methane. Calculate Delta H degree for the monofluorination of methane in kcal/mol.
Use bond energies from the table below to calculate the heat of
reaction.
kJ
Use bond energies from the table below to calculate the heat of reaction. KJ