14C_w11_finalA_key

14C_w11_finalA_key - Chemistry 14C Winter 2011 Final Exam...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 14C Winter 2011 Final Exam Part A Solutions Page 1 Statistics : High score, average and low score will be posted on the course web site after exam grading is complete. The exam is ready to be picked up when these numbers are posted. A note about exam keys : The answers presented here may be significantly longer than expected from a student taking the exam. An exam key serves not only to reveal what was expected, but to instruct you as well. To see the final course grade cutoffs, consult the grading scale on the Chem 14C course web page. 1. Trimethylamine bp 3 o C, putrescine bp 159 o C and cadaverine bp 179 o C. Hydrogen bonding and van der Waals effects . 2. (a) (CH 3 ) 2 NH might have a higher boiling point than (CH 3 ) 3 N because (CH 3 ) 2 NH must overcome intermolecular hydrogens bonds during evaporation whereas (CH 3 ) 3 N does not. (b) (CH 3 ) 2 NH might have a lower boiling point than (CH 3 ) 3 N because (CH 3 ) 3 N has a slightly larger surface area (and hence stronger van der Waals forces) than (CH 3 ) 2 NH. 3. Dipole-dipole, hydrogen bonding, and London dispersion forces. 4.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

14C_w11_finalA_key - Chemistry 14C Winter 2011 Final Exam...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online