Vivek Step-Up Week 7

Q10

Which is the least stable A. B. Br a a z Br E. O O Br $ C. Br D. O ⒸZ. Br

H-CEC H a) Determine the AHron of the following reaction using the provided BDE's. BDE (kJ/mol) CEO 1046 C=O 745 CI-CI 242 C-CI 339 1. Bond Dissociation Energy. CO(g) + Cl(g) Cl,CO(g) emots no ognera ismmoi nibubni) sutourte aiws.l J2ad aris evio aroitesil 20luslom gniwollol at ni nots baisibni orti lo noitesibhidyd basomoog (23nioy 8) (b'qebgaqa BDE (k se the MO bond or b) Is the reaction exothermic or endothermic? Endo or Exo?

Please ex plain and Please show all arrow pushing mechaarsas. Thank you!

2. Use the table below to estimate AH for the reaction NO + O3 → NO2 + O2. Does this reaction consume or produce heat? Single Bond Energies (kJ/mol of bonds) н сN oS F C Br I Н 436 C 413 346 N 391 305 163 O 463 358 201 146 S 347 272 226 - F 565 485 283 190 284 155 Cl 432 339 192 218 255 253 242 Br 366 285 201 217 249 216 193 - I 299 213 201 278 208 175 151 - - Multiple Bond Energies (kJ/mol of bonds) C=C 602 C=N 615 C=O 799 C=C 835 CEN 887 C=O 1072 N=N 418 N=O 607 N=N 945 O=O 498

Consider the following data for bromine: 79.904 mol atomic mass electronegativity 2.96 kJ 324.6 mol electron affinity kJ 1139.9 mol ionization energy kJ 5.8 mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb (1) Br(g) + e - Br (g) Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? no

28. Estimate the enthalpy (change in energy) of reaction for 2 SO(g) + O2(g) →2 SO2(g) using bond energies. Assume that sulfur in SO2 (g) has an expanded octet. -> Bond Energy (kJ/mol) 498 265 a. 498 kJ/mol c. -498 kJ/mol bь. 731 kJ/mol d. -32KJ/mol

Consider the following data for fluorine: 19.00 mol atomic mass electronegativity 3.98 kJ 328. mol electron affinity kJ 1681.0 mol ionization energy kJ 0.26 mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb + (1) F (g) + e F (g) Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): |kJ/mol Does the following reaction absorb or release energy? release absorb (2) F (g) F (g) + e Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? yes O no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): O kJ/mol

Consider the following data Tor yttrium: 88.906 mol atomic mass electronegativity 1.22 kJ 29.6 mol electron affinity kJ 600. mol ionization energy kJ 11.4 mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb (1) Y (g) + e Y (g) Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): kJ/mol Does the following reaction absorb or release energy? release absorb 2+ (2) Y (g) + e - Y (g) Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): |KJ/mol ?

Using the table below where bond energies are in kJ/mol, calculate the enthalpy of the reaction. HC≡C-H + H-I  H2C=CHIC≡C 839 C=C 614H-I 299C-I 240C-H 413 A. 506 B. -931 C. -506 D. -129 E. + 129

Bonds Bond Energy (kJ/mol) C-H 411 C-Br 285 H-Br 362 Br-Br 190 Determine ΔH for the reaction:    CH4 + 2Br2 ----> CH2Br2 + 2HBr

Which of the following is the most stable free-radical? (Note: where resonance structures can be drawn for a species, only one such structure is shown)

The bond dissociation energy to break 3 C-H bond(s) in 1 mole of glycerol (HOCH2CH(OH)CH2OH, see image below) molecules is H Н—с Н—с. H. H -C- H Single Bond H N H 432 411 346 N 386 305 167 459 358 201 142 C=C 602 C=0 799 C=C 835 C=0 1072 Multiple Bonds C=N 615 O=O 494 C=N 887 N=N 942 "All values in kJ/mol"

Please answer this photo and please explain ur reasoning ASAP

Tngth and energy of chemical bonds Ta Which of the highlighted chemical bonds in the molecules below is longest? Shortest? In between? Which highlighted bond requires the highest energy to break? Lowest? In between? Answer these questions by completing the second and third columns in the table. compound length of highlighted bond energy of highlighted bond H CEN: - choose one - v choose one H H 一-1 H C N H choose one -v choose one - v H. H C=N-H choose one choose one H. Check Privacy Center Accessibiity Explanation 2021 McGraw Hill LLC. Al Rights Reserved Terms of Use MacBook A F11

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Which of the following free radicals is the most stable? б III = Select one: O A. III O B. IV O C. II O D. I IV

18. Which of the following statements in regards to the reaction coordinate diagram is true? A.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. B.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an exothermic reaction. C.It takes more energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction. D.It takes less energy to break the old bonds than energy is released in forming new bonds, resulting in an endothermic reaction.

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6. Bond enthalpy Use the given bond enthalpies to estimate the AH for the combustion of 1 mole of methanol. Average Bond Enthalpies: C- H: 413 kJ/mol C- 0: 358 kJ/mol 0-0: 146 kJ/mol C-C: 348 kJ/mol C= 0: 799 kJ/mol O = 0: 495 kJ/mol C= C: 614 kJ/mol O- H: 463 kJ/mol 3 CH3OH+02¬CO02 + 2H20