Search found 11 matches

Thu Mar 03, 2016 1:20 am
Forum: *Cycloalkanes
Replies: 1
Views: 409

This web page very clearly outlines the process of dealing with complex substituents (or, substituents within substituents). It also has a useful table of tert, neo, sec, etc.

http://www.chem.ucalgary.ca/courses/351/orgnom/alkanes/alkanes-04.html
Tue Jan 19, 2016 5:50 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work of expansion question?
Replies: 3
Views: 533

Re: Work of expansion question?

Also, you use the equation w=-P_{ext}\Delta V for when external pressure is constant. The work depends on a change in volume. As the system expands, energy is lost, so work is negative. In general, work done on a system is positive (increases energy of the system), and work done by a system is negat...
Tue Jan 19, 2016 5:35 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Practice Quiz On Various Topics
Replies: 2
Views: 437

Re: Practice Quiz On Various Topics

This seems helpful, I look forward to working through some of the problems. Thanks for posting.
Tue Jan 19, 2016 5:32 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy
Replies: 3
Views: 598

Re: Entropy

Well, the "glossary definition" of residual entropy is:
The nonzero entropy t T=0 in certain systems, which is due to a surviving disorder in the orientation of molecules.
Tue Jan 19, 2016 5:19 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work (w)
Replies: 1
Views: 262

Work (w)

What is the difference between work done on a system vs. work done by a system?
Tue Jan 19, 2016 5:13 pm
Forum: Calculating Work of Expansion
Topic: Pressure-Volume work
Replies: 1
Views: 277

Pressure-Volume work

What is the significance of the relationship between pressure and volume in the pressure-volume curve? (Where the space underneath the curve represents work.)
Fri Nov 27, 2015 5:33 pm
Forum: Molarity, Solutions, Dilutions
Topic: Video Tutorial: Molarity and Dilutions
Replies: 2
Views: 714

Re: Video Tutorial: Molarity and Dilutions

Thank you!
Wed Nov 25, 2015 7:26 pm
Forum: Molarity, Solutions, Dilutions
Topic: Video Tutorial: Molarity and Dilutions
Replies: 2
Views: 714

Video Tutorial: Molarity and Dilutions

Tiffany Jadidian Chem14A Video Molarity and Dilutions.mp4 Hey guys! I hope you find this video on Molarity and Dilution Calculations helpful as you study for the final! Don't forget to review the fundamentals sections. Please comment if you have any additional questions. Thanks, Tiffany Jadidian (4...
Wed Nov 04, 2015 12:36 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: which model of M.O?
Replies: 1
Views: 259

Re: which model of M.O?

For a heteronuclear molecule such as CO, always use the MO diagram for the atom in the molecule with the lowest atomic number. Since for C: Z=6, and for O: Z=8, use the MO arrangement for Z<8.
Sun Oct 25, 2015 5:47 pm
Forum: Lewis Structures
Topic: HW #3.57b
Replies: 1
Views: 320

Re: HW #3.57b

This is from the solutions manual: "Because H is electropositive, its placement near an oxygen atom makes it less likely for that oxygen atom to donate a lone pair to an adjacent atom." Also, the arrangement of three oxygens attached to one sulfur, (with the hydrogen on one of the oxygens)...
Sun Oct 25, 2015 5:23 pm
Forum: Hybridization
Topic: Homework Problem 3.51
Replies: 2
Views: 650

Re: Homework Problem 3.51

The Lewis structure for HClO has O in the middle because this arrangement allows for oxygen and chlorine to each have a formal charge of 0. If Cl were placed in the middle instead, Cl would have a formal charge of +1, and O would have a formal charge of -1. Formal charges of value 0 are favorable si...