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25. The compounds in each part below have the same (or similar) molecular weights. Which compound in each part would you expect to have the higher boiling point? Explain your answers. (a) OH or (b) (CH3)N or 'N' (c) OH or но HO.

25. The compounds in each part below have the same (or similar) molecular weights. Which compound in each part would you expect to have the higher boiling point? Explain your answers. (a) OH or (b) (CH3)N or 'N' (c) OH or но HO.

Chemistry
Chemistry
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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
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25. The compounds in each part below have the same (or similar) molecular weights. Which compound in each part would you expect to have the higher boiling point? Explain your answers. (a) HO or (b) (CH3)3N or (c) OH но OH or 26. Which compound would you expect to have the higher melting point, propane or cyclopropane? Explain your answer. 27. Arrange the following compounds in order of increasing boiling point. Explain your answer in terms of the intermolecular forces in each compound. HO. (a) (b) (c) (d)
Transcribed Image Text:25. The compounds in each part below have the same (or similar) molecular weights. Which compound in each part would you expect to have the higher boiling point? Explain your answers. (a) HO or (b) (CH3)3N or (c) OH но OH or 26. Which compound would you expect to have the higher melting point, propane or cyclopropane? Explain your answer. 27. Arrange the following compounds in order of increasing boiling point. Explain your answer in terms of the intermolecular forces in each compound. HO. (a) (b) (c) (d)
1. Propose structures for two constitutional isomers of cyclopentene that do not contain a ring. Cyclopentene 2. Write ô+ and 6- by the appropriate atoms and draw a dipole moment vector for any of the following molecules that are polar: а. HF b. IBr с. Вr d. F2 3. Boron trifluoride (BF;) has no dipole moment (µ = 0 D). Explain how this observation confirms the geometry of BF3 predicted by VSEPR theory. 4. Tetrachloroethene (CCI2=CC12) does not have a dipole moment. Explain this fact on the basis of the shape of CCI2=CCI2. 5. Sulfur dioxide (SO2) has a dipole moment (µ = 1.63 D); on the other hand, carbon dioxide (see Solved Problem 2.2) has no dipole moment (u = 0 D). What do these facts indicate about the geometry of sulfur dioxide? 6. Using a three-dimensional formula, show the direction of the dipole moment of CH3OH. Write ô+ and 6- signs next to the appropriate atoms. 7. Trichloromethane (CHCI3, also called chloroform) has a larger dipole moment than CFC13. Use three- dimensional structures and bond moments to explain this fact.
Transcribed Image Text:1. Propose structures for two constitutional isomers of cyclopentene that do not contain a ring. Cyclopentene 2. Write ô+ and 6- by the appropriate atoms and draw a dipole moment vector for any of the following molecules that are polar: а. HF b. IBr с. Вr d. F2 3. Boron trifluoride (BF;) has no dipole moment (µ = 0 D). Explain how this observation confirms the geometry of BF3 predicted by VSEPR theory. 4. Tetrachloroethene (CCI2=CC12) does not have a dipole moment. Explain this fact on the basis of the shape of CCI2=CCI2. 5. Sulfur dioxide (SO2) has a dipole moment (µ = 1.63 D); on the other hand, carbon dioxide (see Solved Problem 2.2) has no dipole moment (u = 0 D). What do these facts indicate about the geometry of sulfur dioxide? 6. Using a three-dimensional formula, show the direction of the dipole moment of CH3OH. Write ô+ and 6- signs next to the appropriate atoms. 7. Trichloromethane (CHCI3, also called chloroform) has a larger dipole moment than CFC13. Use three- dimensional structures and bond moments to explain this fact.
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