Search found 10 matches

by Diana_OToole_1F
Sun Mar 19, 2017 1:00 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 10072

Re: Naming [ENDORSED]

So cis- trans- and E, Z are always interchangeable? No, cis/trans is comparing identical groups or the longest chain, but E/Z is based on a priority system. The question will probably ask to label something as either cis/trans OR E/Z. But if it doesn't specify, it's suggested to always use E/Z beca...
by Diana_OToole_1F
Sun Mar 19, 2017 12:56 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8034
Views: 1407964

Re: Post All Chemistry Jokes Here

If you ever forget how to draw a chair, just remember the Budweiser logo!
by Diana_OToole_1F
Fri Mar 17, 2017 9:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 281
Views: 134625

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle,
Thank you so much for always being encouraging of us and patient. Your cheerful attitude made class enjoyable!
by Diana_OToole_1F
Mon Mar 06, 2017 4:29 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Intermediates and transition states
Replies: 1
Views: 351

Intermediates and transition states

On page 85 in the diagrams of the transition states, I noticed that where H attaches to C in the intermediate it is written as CH 2 . It's also written that way in step 2 as the product. But on the previous page that part of the intermediate is written as CH-H (bond is a vertical line). I was wonder...
by Diana_OToole_1F
Thu Mar 02, 2017 6:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Friday Review Session Broadcast
Replies: 3
Views: 421

Re: Friday Review Session Broadcast

Just wondering if anything about this has been organized yet?
by Diana_OToole_1F
Sun Feb 26, 2017 10:41 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Review of Organic Chem from Chem 14A
Replies: 1
Views: 293

Review of Organic Chem from Chem 14A

What topics specifically would be beneficial to review from the organic chemistry portion of Chem 14A, other than Lewis structures and hybridization? I'm finding that I need to review this information a bit more to fully understand what we are covering in class now.
by Diana_OToole_1F
Sun Feb 12, 2017 8:12 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Scientific Notation
Replies: 1
Views: 327

Scientific Notation

I noticed a lot of the solutions to textbook problems in the solutions manual use scientific notation at every step of calculations when the values are rather large. But when compared to my final answers they're a couple values off (I would input it all into my calculator at once and then convert to...
by Diana_OToole_1F
Sun Jan 29, 2017 10:06 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Quiz question #7
Replies: 1
Views: 332

Quiz question #7

On the practice quiz it's asking which of the list of processes leads to an increase in entropy and I don't understand why "5) A glass of water loses 100J of energy reversibly at 30ºC" doesn't lead to an increase in entropy. If it's a reversible process and the temperature is constant, mor...
by Diana_OToole_1F
Sat Jan 21, 2017 7:51 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible vs irreversible [ENDORSED]
Replies: 2
Views: 464

Re: Reversible vs irreversible [ENDORSED]

Pages 32-33 of the Course Reader say: Systems are often approximated as reversible: calculate maximum work w max = w rev (>w irr ) All real processes are irreversible. Biochemical systems often use highly irreversible reactions to speed up the process. But less efficient (less useful work done) w re...
by Diana_OToole_1F
Sun Jan 15, 2017 8:56 pm
Forum: Phase Changes & Related Calculations
Topic: Other examples of elements which go through sublimation
Replies: 4
Views: 2005

Re: Other examples of elements which go through sublimation

In the textbook on page 368 it gave a couple more examples of substances that sublimate: "Some solids vaporize in the process called sublimation , which we can observe at room temperature in the presence of pungent solids such as menthol and mothballs (naphthalene)". Naphthalene is used in...

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