Search found 18 matches

by William Shu 1G
Sun Mar 19, 2017 1:34 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Torsional Strain
Replies: 1
Views: 938

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.
by William Shu 1G
Sun Mar 19, 2017 1:41 am
Forum: General Rate Laws
Topic: Units for Rate Constants
Replies: 1
Views: 251

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
by William Shu 1G
Wed Mar 15, 2017 4:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Common names on final
Replies: 3
Views: 376

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!
by William Shu 1G
Thu Mar 09, 2017 9:19 am
Forum: Administrative Questions and Class Announcements
Topic: Posts
Replies: 23
Views: 2588

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.
by William Shu 1G
Wed Mar 01, 2017 3:11 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Question from midterm
Replies: 2
Views: 352

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!
by William Shu 1G
Fri Feb 24, 2017 2:32 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Pre Equilibria
Replies: 2
Views: 359

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.
by William Shu 1G
Sat Feb 11, 2017 4:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Winter 2017
Replies: 87
Views: 14474

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.
by William Shu 1G
Wed Feb 01, 2017 10:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Preparation Answers
Replies: 130
Views: 13730

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...
by William Shu 1G
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: 299

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...
by William Shu 1G
Wed Jan 18, 2017 9:47 pm
Forum: Phase Changes & Related Calculations
Topic: Question about state functions
Replies: 2
Views: 273

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...
by William Shu 1G
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: 173

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!
by William Shu 1G
Tue Nov 29, 2016 7:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: What does Kc tell us?
Replies: 5
Views: 3631

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...
by William Shu 1G
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: 372

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.
by William Shu 1G
Mon Nov 14, 2016 12:26 pm
Forum: Naming
Topic: Polydentrites/Monodentrite [ENDORSED]
Replies: 1
Views: 202

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!
by William Shu 1G
Thu Oct 27, 2016 8:27 pm
Forum: Dipole Moments
Topic: Dipole Moment in a Lewis Structure
Replies: 5
Views: 1175

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?
by William Shu 1G
Thu Oct 13, 2016 6:36 pm
Forum: Properties of Light
Topic: Practice Quiz 1 Question [ENDORSED]
Replies: 5
Views: 790

Re: Practice Quiz 1 Question [ENDORSED]

I'm fairly certain that as a wavelength, you can keep the units as nanometers.
by William Shu 1G
Wed Oct 05, 2016 11:45 am
Forum: Properties of Light
Topic: Chapter 1 Homework Question [ENDORSED]
Replies: 7
Views: 2019

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!
by William Shu 1G
Mon Sep 26, 2016 8:08 pm
Forum: Properties of Light
Topic: EM radiation and Colors
Replies: 2
Views: 289

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...

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