Homework 10 (Chapter 11 & 12)

Homework 10 (Chapter 11 & 12) - has London...

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Michael Yagudayev 106180606 CHE 131 R01 Homework 10 Chapters 11 and 12 Chapter 11 21. = = . = . m dV 787gL0 250 L 196 75 g methanol = . × . = . × . n 196 75 g CH3OH 1 mol CH3OH32 04 g 6 14 moles methanol 38 0 = . kJmol 233 35 kJ 23. = = . . = . → = . × = . = m dV 13 6gmL 500 mL Hg 6 80 g Hg E 6 80 g Hg 294 Jg 1999 2 J 2 kJ Water: = = . =. → =. × . = . m dV 1gmL 500 mL H2O 500 g n 500 g 1 mol18 02 g 0 02775 mol = . × . = . E 0 02775 mol 40 7 kJmol 1 13 kJ Water has a much smaller molar mass than mercury and therefore requires less energy to vaporize 28. Substance D will have stronger intermolecular forces at 25°C because it requires more energy than the other substances to break the bonds. 40. . × . = . 0 5 mol H2O 18 02 gmol 9 01 g H2O → = . . ° =. ; → = . × . = . ; ∆HA B 9 01 g2 06Jg C5℃ 092 kJ ∆HB C 0 5 mol 6 020 kJmol 3 01 kJ → = . . ° = . ; → = . × . = . ∆HC D 9 01 g4 184 Jg C100℃ 3 77 kJ ∆HD E 0 5 mol 40 7 kJmol 20 35 kJ = . + . + . + . = . Etotal 0 092 kJ 3 01 kJ 3 77 kJ 20 35 kJ 27 222 kJ 46. (a) has the highest melting point due to its covalent bonds. (d) has the lowest melting point because it only
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Unformatted text preview: has London dispersion forces and is much smaller in molar mass than I 2 . 51. (a) gas (b) liquid (c) solid 54. (a) amorphous (b) metallic (c) network (d) ionic 62. Face-centered cubic; edge of 620 pm ; =( ) +( ) = = . unit cell diagonal 620 pm 2 620 pm 2 c2 c 876 8 pm = . = . 4r 876 8 pm r 219 2 pm 65. = ++-= ; = = d 2rCs 2rCl 696 ppm s d3 402 ppm Chapter 12 26. (a) none (b) none (c) 30. A compound can exist as a pair of enantiometers if it is a chiral molecule. 35. (a) tertiary (b) primary (c) secondary (d) secondary (e) tertiary (f) secondary 37. (a) (b) 39. (a) CH 3 CH 2 CH(CH 3 )CH 2 OH (b) CH 3 CH 2 CH(OH)CH 2 CH 3 (c) CH 3 CH(CH 3 ) CH 2 CH 2 OH 45. (a) (b) (c) 47. (a) CH 3 CH 2 COOH + CH 3 OH (b) HCOOH + CH 3 CH 2 OH (c) CH 3 COOH + CH 3 CH 2 OH...
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Homework 10 (Chapter 11 & 12) - has London...

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