Search found 12 matches

by Annie Zhang_ 3C
Sat Mar 18, 2017 12:49 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 7243

Re: Naming [ENDORSED]

I'm a little confused on what cases to use prefixes like iso and neo rather than the normal numbering I also have this question - although I understand that you use iso- and neo- when you see specific groups, I can't quite understand how to identify them and when to use iso- or neo- as opposed to o...
by Annie Zhang_ 3C
Thu Mar 09, 2017 8:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 12504

Re: Final Exam Details and Review Sessions Winter 2017

Will we know how many questions are on the final? Thanks!
by Annie Zhang_ 3C
Tue Mar 07, 2017 2:41 am
Forum: Administrative Questions and Class Announcements
Topic: Quiz 3 Winter 2017
Replies: 183
Views: 14414

Re: Quiz 3 Winter 2017

304751905 wrote:for #1, why do we need "iso" infant of propyl? wouldn't the 4- signify the branching?



I believe the iso- indicates a structural connectivity of (CH3)2CH- , as indicated in page 9 of the Ochem green booklet.
by Annie Zhang_ 3C
Fri Mar 03, 2017 1:19 am
Forum: *Amines
Topic: Priority
Replies: 3
Views: 452

Re: Priority

Hi, out of curiosity and desire to learn, could you explain what this question means in more detail please? Thanks so much!
by Annie Zhang_ 3C
Tue Feb 21, 2017 12:56 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 785675

Re: Post All Chemistry Jokes Here

If you're not part of the solution, you're part of the precipitate!
by Annie Zhang_ 3C
Sat Feb 18, 2017 5:39 pm
Forum: General Rate Laws
Topic: General Rate Question
Replies: 2
Views: 240

Re: General Rate Question

I would think that using different metric prefixes doesn't really make a difference (as long as in the end, it is correctly stated) but if the question uses different units (ex atm vs pascals, kelvins vs celsius) I agree that you ought to give the answer in the same units as you started with in the ...
by Annie Zhang_ 3C
Mon Feb 13, 2017 12:38 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Example 14.10 Using Nerst Equation to find Concentration
Replies: 1
Views: 176

Example 14.10 Using Nerst Equation to find Concentration

Hi all,
I'm having some difficulty understanding how the equation in example 14.10 (page 589 of textbook) was set up. Could someone walk me through the process step by step of how to know that the cell reaction is Ag(s) | Ag + (ag, L) || Ag+ (aq, R)|Ag(s) ? Thanks!
by Annie Zhang_ 3C
Sat Feb 04, 2017 1:46 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Sig figs
Replies: 3
Views: 429

Re: Sig figs

To add to the above, the textbook (6th edition) has notes for how to do sig figs on pages A5 and F10 of the appendix. Specifically, rules for logarithms and exponentials are on page A6 that basically say that the answer should have the same number of sig figs as the original number. Hope that lookin...
by Annie Zhang_ 3C
Sat Jan 28, 2017 3:17 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Q and -Q
Replies: 2
Views: 220

Re: Q and -Q

Hi, Just to continue off the other response, this is basically the first law of thermodynamics. It states that "the internal energy of an isolated system is constant"; the universe can be considered an isolated system. Thus, we can say that (as Stephanie said) energy is always conserved, s...
by Annie Zhang_ 3C
Fri Jan 20, 2017 8:45 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Themodynamics: Systems at Equilibrium [ENDORSED]
Replies: 1
Views: 201

Themodynamics: Systems at Equilibrium [ENDORSED]

Hi, I was a little confused as to the note on page 22 of the course reader that stated that thermodynamics is the study of changes in energy for systems in equilibrium, and then that the change in work would thus depend on small fluctuational biases of things like the pressure or volume? How does on...
by Annie Zhang_ 3C
Fri Jan 13, 2017 8:25 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy vs Energy
Replies: 2
Views: 263

Re: Enthalpy vs Energy

I think this is a complicated question too! To add to the above answer by Emily, I think it helps to remember that increase or decrease of heat in the system is essentially energy going into or out of the system, respectively, in the heat form. Enthalpy describes this amount of heat released or abso...
by Annie Zhang_ 3C
Mon Jan 09, 2017 8:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Discussion 1A
Replies: 1
Views: 208

Discussion 1A

Hi all,

I'm currently in discussion 1A (Tues 8am) and am looking for a discussion Wed or Friday morning. Please let me know if you'd be available to switch!

Thanks

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