Search found 10 matches

by DianaR2I
Fri Mar 17, 2017 11:42 pm
Forum: *Cyclopropanes and Cyclobutanes
Topic: Draw the conformations
Replies: 2
Views: 1442

Re: Draw the conformations

Hi, Professor Lavelle announced we would only need to know how to draw the chair conformation for cyclohexane.

viewtopic.php?f=160&t=20492&p=59138&hilit=conformation&sid=87a1d6a0ea623b599f3c3b6bda0226fd#p59138
by DianaR2I
Thu Mar 09, 2017 2:19 pm
Forum: *Cycloalkanes
Topic: Practice problem (Naming)
Replies: 2
Views: 692

Re: Practice problem (Naming)

Hi! The prefix iso- is included when putting the substituents in alphabetical order. Other prefixes like tert- and sec- aren't though. Hope this helps. :)
by DianaR2I
Sun Mar 05, 2017 11:14 pm
Forum: *Electrophiles
Topic: Is F a electrophile or nucleophile?
Replies: 16
Views: 3033

Re: Is F a electrophile or nucleophile?

F- is a nucleophile.
by DianaR2I
Sun Feb 26, 2017 9:47 pm
Forum: *Nucleophiles
Topic: Intro to O Chem
Replies: 5
Views: 924

Re: Intro to O Chem

The rest of the material should be covered in the Introduction to Chemistry book we bought along with the course reader. There doesn't seem to be any other readings assigned from the textbook.
by DianaR2I
Sun Feb 19, 2017 11:34 pm
Forum: General Rate Laws
Topic: RXN rate graph of zero order
Replies: 1
Views: 541

Re: RXN rate graph of zero order

Yes, you're correct. The graph of a first order reaction and a second order reaction appear to be linear since the data was manipulated to appear that way by either plotting the data as ln [A] or 1/[A] against time. If the concentrations ([A]) were plotted against time, the first order and second or...
by DianaR2I
Sun Feb 12, 2017 9:49 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Entropy @ 0K
Replies: 2
Views: 589

Re: Entropy @ 0K

CO would have a higher molar entropy than I2 at 0 K since the CO molecule has a more complex molecular arrangement than the I2 molecule. In other words, CO will have a higher degeneracy than I2 (W for CO= 2; W for I2= 1), resulting in CO having a larger entropy than I2 (S= Kb *InW). This concept is ...
by DianaR2I
Sun Feb 05, 2017 7:53 pm
Forum: Balancing Redox Reactions
Topic: What is the purpose of a salt bridge?
Replies: 3
Views: 7315

Re: What is the purpose of a salt bridge?

The salt bridge allows for ion transfer between the anode solution and the cathode solution. So, it maintains both solutions at a neutral state, meaning the electron flow will be able to continue for a more extended period of time.
by DianaR2I
Sun Feb 05, 2017 7:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Potential Difference vs. EMF
Replies: 2
Views: 538

Re: Potential Difference vs. EMF

Emf is the maximum potential difference between the two electrodes ( cathode/anode) when no current is flowing in the circuit. Potential difference is the difference between the electrode potentials when current is flowing.
by DianaR2I
Mon Jan 23, 2017 3:51 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.25 HW problem
Replies: 1
Views: 495

Re: 8.25 HW problem

In this problem, I think you have to first find the heat capacity of the calorimeter by dividing the heat (q) by the change in temperature (7.32 degrees C). Once you have that value, you can use it to find the amount of heat released by the reaction in the subsequent experiment. Using the equation P...
by DianaR2I
Mon Jan 23, 2017 3:19 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Ch. 8 Number 31
Replies: 2
Views: 2082

Re: Ch. 8 Number 31

The values 3/2R and 5/2R are also listed in the Constants and Formulas page on page 125 of the course reader.

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