Problem Sets #3 â?? Chapters 12, 13Place your answers to this problem set on a Scantron sheet (#4521

Problem Sets #3 – Chapters 12, 13Place your answers to this problem set on a Scantron sheet (#4521) and hand it in before orafter class on 2/6/2012 for the MW class and 2/2/2012 for the TR class. No papers will beaccepted after the above dates. Be sure to bubble in your name (last then first) and your Znumber (just the number) on the Scantron sheet. If a topic has not been covered in class,research it in your textbook.1. Which of the following statements concerning dipole-dipole attractions is correct?a) Dipole-dipole attraction is a weaker force than covalent bonds, being about 50% as strong.b) Dipole-dipole attractions increase as the distance between the dipoles increase.c) Dipole-dipole attractions are weak due in part to the fact that the charges associated withdipoles are only partial, rather than full charges.d) All the above statements are correct.e) None of the above statements are correct.2. Which one of the following molecules is the most polarizable?a) H3C – Ib) H3C – CH3d) H3C – Hc) H3C – Fe) H3C – OH**Note: On an exam I might ask you to the order of boiling points (lowest to highest) for these 5compounds.3. For a series of small molecules of comparable molecular mass, which of the followingchoices lists the intermolecular forces in the correct increasing order?a) dipole-dipole forces < London forces < hydrogen bondsb) hydrogen bonds < dipole-dipole forces < London forcesc) dipole-dipole forces < hydrogen bonds < London forcesd) London forces < dipole-dipole forces < hydrogen bondse) hydrogen bonds < London forces < dipole-dipole forces4. The order of the boiling points for the hydrogen halides, except for HF, isHI > HBr > HCl. The reason for this order can be attributed toa)b)c)d)e)the relative covalent bond strengths.differences in hydrogen bonding.differences in dipole-dipole attractions.differences in London forces.differences in dipole/induced dipole interactions5. Which compound below would be expected to have the highest boiling point?a) CH3-CH2-CH2-CH2-CH2-CH2-CH3b) CH3-CH2-CH2-CH2-CH-CH3|CH3c) CH3-CH-CH2-CH-CH3||CH3CH3d)CH3|CH3-CH-C-CH3||CH3 CH36. Three factors control the rate of evaporation of a liquid: surface area, temperature, andstrengths of intermolecular forces. More than one of the statements given described a correcteffect. The statements are (1) the larger the surface area, the faster the rate of evaporation of theliquid, (2) the higher the temperature, the faster the rate of evaporation of the liquid, and (3) thestronger the intermolecular attractive forces, the faster the rate of evaporation of the liquid.Which choices are correct?a) choices 1 and 2b) choices 1 and 3c) choices 2 and 3d) all three choices are valid and describe a correct effect.e) none of the three choices describe a correct effect.7. Given the following “substances” and their normal boiling points, in o C:G: 43.8 o CJ: 93.7 o CM: 56.7 o CT: 83.5 o CR: 63.6 o CWhich set below correctly lists some of these liquids in order of increasing intermolecularforces at 20 oC?a) G