Search found 18 matches
- Sun Mar 19, 2017 1:34 pm
- Forum: *Cyclopropanes and Cyclobutanes
- Topic: Torsional Strain
- Replies: 1
- Views: 1955
Re: Torsional Strain
Torsional strain is a result of eclisped hydrogens. If you observe the chair conformation on cyclohexanes, they have only single bonds but have no torsional strain due to the staggered hydrogens.
- Sun Mar 19, 2017 1:41 am
- Forum: General Rate Laws
- Topic: Units for Rate Constants
- Replies: 1
- Views: 563
Re: Units for Rate Constants
Assuming time is in seconds:
Zero order: k has units M/s
First order: k has units s^-1
Second order: k has units M^-1 s^-1
Zero order: k has units M/s
First order: k has units s^-1
Second order: k has units M^-1 s^-1
- Wed Mar 15, 2017 4:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Common names on final
- Replies: 3
- Views: 766
Re: Common names on final
Some common names such as iso- prefixes are also used as substituents in IUPAC naming, but as for the overall picture I feel like Dr. Lavelle leans toward IUPAC naming and wouldn't require both on the final. Not sure though, so if someone else could confirm this that'd be great!
- Thu Mar 09, 2017 9:19 am
- Forum: Administrative Questions and Class Announcements
- Topic: Posts
- Replies: 23
- Views: 4300
Re: Posts
I'm fairly certain since each week for posts ends at midnight every Sunday then time does in fact count when checking how many posts one has made.
- Wed Mar 01, 2017 3:11 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Question from midterm
- Replies: 2
- Views: 699
Re: Question from midterm
There is no change in volume of the total system. Yes, the valve is being opened inside the system, but the system is not interacting with the surroundings in any way. Also, if you use the equation q=-w after knowing q, then you could also find that w=0. Hope this helps!
- Fri Feb 24, 2017 2:32 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre Equilibria
- Replies: 2
- Views: 640
Re: Pre Equilibria
To add on to that, since it is a solvent for the reaction, the concentration of water is in excess and therefore would not have a contribution to the rate of the reaction.
- Sat Feb 11, 2017 4:00 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Winter 2017
- Replies: 87
- Views: 21270
Re: Midterm Winter 2017
Ashley Curtis 2O wrote:I am having trouble viewing the midterm review session. Is there any one else having this problem? It says the plugin is not supported when I try and watch it.
I believe you can also click on the link to download it, if the plug-in is not working.
- Wed Feb 01, 2017 10:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 1 Preparation Answers
- Replies: 130
- Views: 25834
Re: Quiz 1 Preparation Answers
Can someone please explain why 3 is an answer for #7? I understand why number 2 is an answer. I believe 3 is an answer because by following PV = nRT, if temperature increases and pressure and number of moles stays constant, the volume must also increase to match the temperature and therefore the en...
- Wed Jan 25, 2017 12:59 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Reversible/Irreversible processes In the book
- Replies: 1
- Views: 542
Re: Reversible/Irreversible processes In the book
Not 100% sure, but I think it has to do with the fact that an irreversible process is one that takes the system away from equilibrium. A reversible process would imply that infinitely small changes are occurring while the external pressure is slowly increasing, and therefore the piston would be movi...
- Wed Jan 18, 2017 9:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Question about state functions
- Replies: 2
- Views: 499
Re: Question about state functions
How I understand it is that internal energy is simply the value of energy in the system at any given point in time and it doesn't depend on fluctuation, only on final and initial values. Heat and work may be how it gets there, but mathematically internal energy still remains as a state function. I h...
- Fri Jan 13, 2017 9:51 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpy Question
- Replies: 1
- Views: 362
Re: Bond Enthalpy Question
In lecture, it was said that the double bond is broken and a single bond is formed, since those are really the only ones we can measure rather than simply breaking one of the bonds in a double bond structure. Hope this helps!
- Tue Nov 29, 2016 7:18 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: What does Kc tell us?
- Replies: 5
- Views: 9018
Re: What does Kc tell us?
Essentially, it is just the value of the concentration of products over reactants that tells you where the reaction sits at equilibrium. Seeing as the reaction will always shift toward equilibrium, if you know Kc then you can determine how the reaction will behave when you have a certain amount of r...
- Wed Nov 23, 2016 1:11 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Keeping Equilibrium with Pressure
- Replies: 2
- Views: 704
Re: Keeping Equilibrium with Pressure
Also keep in mind that a pressure change as a result of adding inert gas to the system will have no effect on the concentrations of the other gases, thereby having no change in the state of the reaction.
- Mon Nov 14, 2016 12:26 pm
- Forum: Naming
- Topic: Polydentrites/Monodentrite [ENDORSED]
- Replies: 1
- Views: 462
Re: Polydentrites/Monodentrite [ENDORSED]
A ligand that is polydentate has multiple binding sites, while a ligand that is monodentate only has one binding site. Hope this helps!
- Thu Oct 27, 2016 8:27 pm
- Forum: Dipole Moments
- Topic: Dipole Moment in a Lewis Structure
- Replies: 5
- Views: 2172
Re: Dipole Moment in a Lewis Structure
Is it just a matter of determining which atom has a higher electronegativity, and then drawing the dipole moment from there?
- Thu Oct 13, 2016 6:36 pm
- Forum: Properties of Light
- Topic: Practice Quiz 1 Question [ENDORSED]
- Replies: 5
- Views: 1504
Re: Practice Quiz 1 Question [ENDORSED]
I'm fairly certain that as a wavelength, you can keep the units as nanometers.
- Wed Oct 05, 2016 11:45 am
- Forum: Properties of Light
- Topic: Chapter 1 Homework Question [ENDORSED]
- Replies: 7
- Views: 4829
Re: Chapter 1 Homework Question [ENDORSED]
Personally I don't quite understand the correspondence between energy and "The extent of the change in the electrical field at a given point". Could someone explain this aspect please? Thank you!
- Mon Sep 26, 2016 8:08 pm
- Forum: Properties of Light
- Topic: EM radiation and Colors
- Replies: 2
- Views: 518
Re: EM radiation and Colors
To my knowledge, visible light is visible because the photons in the light are picked up by photoreceptor cells in your eyes that then transmit the information to the brain for processing. As for color filters, the filter simply absorbs the colors that are not passing through the filter, which would...