Search found 29 matches
- Sat Mar 18, 2017 10:44 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: How to tell if you're dealing with an ideal gas?
- Replies: 3
- Views: 2009
Re: How to tell if you're dealing with an ideal gas?
I think in 14B we have only really used ideal gasses in problems, so it's safe to assume it is an ideal gas, even if it only says gas.
- Sat Mar 18, 2017 1:11 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Equilibrium Values
- Replies: 2
- Views: 676
Re: Equilibrium Values
To further answer your question, when delta G is positive it is not spontaneous, when it is negative it is spontaneous.When Delta S total is positive the process is spontaneous, and when it is negative it is not spontaneous.
- Fri Mar 17, 2017 12:17 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051909
- Mon Mar 13, 2017 1:23 am
- Forum: *Alkanes
- Topic: Naming [ENDORSED]
- Replies: 93
- Views: 16332
Re: Naming [ENDORSED]
I think generally iso and neo are for alkyl groups and sec and tert are used for carbon atoms which have functional groups
- Thu Mar 09, 2017 7:21 pm
- Forum: *Electrophiles
- Topic: Determining if a molecule is a nucleophile
- Replies: 4
- Views: 1556
Re: Determining if a molecule is a nucleophile
I thought the rule was that if there is a partial negative or full negative, no matter what it is a nucleophile. For an electrophile, if there is a partial positive or full positive it is always an electrophile. Is this correct?
- Thu Mar 09, 2017 7:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29265
Re: Quiz 3 Winter 2017
Is it correct that electrophilic addition always has 2 intermediates where SN2 only has 1?
- Sun Mar 05, 2017 10:58 pm
- Forum: *Alkanes
- Topic: Naming Organic Molecules
- Replies: 5
- Views: 1065
Re: Naming Organic Molecules
I thought the parent chain could go either left to right or right to left? Does the direction of the chain matter?
- Sat Mar 04, 2017 3:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 2 Winter 2017
- Replies: 160
- Views: 24339
Re: Quiz 2 Winter 2017
What was the average for Quiz 3?
- Sun Feb 26, 2017 8:19 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Midterm #3b
- Replies: 2
- Views: 661
Re: Midterm #3b
For this question, it may have been important to discuss the gas, not just the amount of substances. Specifically, because there is gas on the reactant side but no gas on the product side, the entropy is decreased.
- Sun Feb 19, 2017 3:18 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: First order, second order reactions [ENDORSED]
- Replies: 6
- Views: 1395
Re: First order, second order reactions [ENDORSED]
Will we ever be asked to do a third or forth order reaction even though it wasn't covered in the course reader?
- Sun Feb 12, 2017 11:37 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G vs Delta G0
- Replies: 5
- Views: 7832
Re: Delta G vs Delta G0
You use the same equations for both. The difference is that deltaG0 is with standard conditions whereas deltaG is with nonstandard conditions.
- Sun Feb 05, 2017 6:02 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Question on Units of Temperature
- Replies: 4
- Views: 768
Re: Question on Units of Temperature
Can you write all of the answers on quizzes/midterms in Kelvin?
- Sun Feb 05, 2017 5:55 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy
- Replies: 8
- Views: 1590
Re: Enthalpy
How do you know when to use Kelvin or Celsius in a problem? Can you just always use and convert a question to Kelvin?
- Mon Jan 30, 2017 6:40 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25415
Re: Quiz 1 Preparation Answers
Is there a PDF that someone could post with exactly how to solve each problem on Quiz 1 Prep?
- Sun Jan 29, 2017 4:57 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051909
- Sun Jan 22, 2017 5:22 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Significant Figure [ENDORSED]
- Replies: 7
- Views: 1354
Re: Significant Figure [ENDORSED]
Can someone post the exact rules for significant figures or does anyone know where I could find them?
- Sun Jan 22, 2017 5:20 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Tutoring? [ENDORSED]
- Replies: 121
- Views: 242256
Re: Tutoring? [ENDORSED]
Hi, if you are not a part of AAP, are you still able to attend sessions? Also, does anyone have the exact requirements to be able to attend the sessions?
- Mon Jan 16, 2017 12:00 am
- Forum: Student Social/Study Group
- Topic: Chemistry Joke
- Replies: 28
- Views: 6383
Re: Chemistry Joke
A man and a woman are sitting at a bar. One has a shirt saying 'Polar', the other, 'Non Polar'
Woman: Sorry, I just don't think the chemistry is right.
Woman: Sorry, I just don't think the chemistry is right.
- Tue Jul 26, 2016 11:59 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Subscript and oxidation number
- Replies: 1
- Views: 686
Re: Subscript and oxidation number
The oxidation number would be 2. Which subscript are you referring to?
- Tue Jul 26, 2016 4:47 pm
- Forum: *Indicators
- Topic: Indicators
- Replies: 6
- Views: 2166
Re: Indicators
Other than indicators, is there anything else in the course reader that will be excluded from the final?
- Wed Jul 20, 2016 3:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: When to use Kp or Kc
- Replies: 2
- Views: 891
When to use Kp or Kc
If we have a reaction and all the reactants and products are gasses, (none are aqueous) can we use either concentrations (Kc) or partial pressures (Kp), or are we only suppose to use Kp since they are all gasses?
- Wed Jul 20, 2016 3:35 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changing amount of a Solid
- Replies: 3
- Views: 895
Re: Changing amount of a Solid
If we changed the temperature would we also not include 3Fe since it is a solid?
- Mon Jul 18, 2016 10:08 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Bonding Strength
- Replies: 3
- Views: 841
Re: Bonding Strength
Is there a relation between bond strength and bond order?
- Mon Jul 18, 2016 9:54 pm
- Forum: Naming
- Topic: Iron [ENDORSED]
- Replies: 6
- Views: 1434
Re: Iron [ENDORSED]
I know iron is a common transition metal which changes to ferrate when it is an anion. I was wondering if copper did the same thing where copper as a cation is “copper” and as an anion it is “cuprate”?
Re: "ion"
If the coordination compound has a net electric charge do you have to put the word “ion” at the end, or is it just optional to add “ion” when naming a coordination compound?
- Thu Jul 14, 2016 9:31 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: electron domain geometry vs molecular geometry [ENDORSED]
- Replies: 3
- Views: 1868
Re: electron domain geometry vs molecular geometry [ENDORSED]
Just to clarify, for electron domain geometry should we count the lone pairs as bonds, for example, would AX2E2 be tetrahedral, or should we not include the lone pairs at all when looking at electron geometry and AX2E2 should be considered linear?
- Sun Jul 10, 2016 8:49 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration of HOCO
- Replies: 2
- Views: 546
Electron Configuration of HOCO
How do you determine which element to put the extra electron onto in the example on the Midterm (A Session 2016 Q9B) of HOCO?
- Sun Jul 03, 2016 10:53 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051909
Re: Chemistry Jokes
Q: What did the bartender say when oxygen, hydrogen, sulfur, sodium, and phosphorous walked into his bar?
A: OH SNaP!
A: OH SNaP!
- Tue Jun 28, 2016 6:03 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3051909
Re: Chemistry Jokes
Q: What does a photon say when he checks into a hotel and is asked if he needs any help with his luggage.
A: He says, "No, I'm traveling light."
A: He says, "No, I'm traveling light."