Search found 13 matches

by Brianna
Sat Mar 12, 2016 9:58 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7348
Views: 882865

Re: Chemistry Jokes

In honor of a very successful quarter of chemistry jokes from my peers in 14B I would just like to say that personally, I tell bad chemistry jokes because all of the good ones Argon!
by Brianna
Fri Mar 04, 2016 3:32 pm
Forum: *Alkanes
Topic: Halogen substituents
Replies: 3
Views: 329

Re: Halogen substituents

Our course reader states that is always goes by alphabetical order so I would go with that.
by Brianna
Sun Feb 28, 2016 5:16 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Vinyl
Replies: 1
Views: 239

Re: Vinyl

It is the functional group −CH=CH2
by Brianna
Thu Feb 25, 2016 4:11 pm
Forum: *Cycloalkanes
Topic: Counting Carbons
Replies: 2
Views: 376

Re: Counting Carbons

for ring structures, the longest carbon chain is always the ring unless the substituent has a higher number of carbons by itself. For example, if your structure was a cyclohexane ring and a heptane subsistent, the heptane is the longest chain and gets to be the main name.
by Brianna
Tue Feb 16, 2016 4:36 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Homework Problem 15.71
Replies: 1
Views: 311

Re: Homework Problem 15.71

I believe in this scenario, it is clear that the hydroxide is not an intermediate because it is not a product that is then used as a reactant like the other intermediates. Notice that it appears on the reactant side and then the product side where as the actual intermediates appear as products and t...
by Brianna
Fri Feb 12, 2016 3:34 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Why K isn't determinant on reactants?
Replies: 3
Views: 399

Re: Why K isn't determinant on reactants?

K should go up when the concentration of products increases and it should go down when concentration of reactant increases. Is there a problem where this does not occur?
by Brianna
Thu Feb 04, 2016 5:11 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Midterm 2011 7/8 D
Replies: 1
Views: 203

Re: Midterm 2011 7/8 D

When you used the latter equation, did you remember to also use .02569V instead of .0592V? It should be set up: lnk=(nE)/.02569.

Then, when you plug in .033 and 2 for n and E, you should get 10 for K.
by Brianna
Tue Feb 02, 2016 4:11 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Double lines in cell diagrams
Replies: 2
Views: 372

Re: Double lines in cell diagrams

Yes, the double line represents the salt bridge which will always be present in cell diagrams. However, the single line may not always be there is there is not a phase change between the product and reactant.
by Brianna
Thu Jan 28, 2016 11:33 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Useful Summary of Thermodynamic Definitions
Replies: 23
Views: 13421

Re: Useful Summary of Thermodynamic Definitions

jennymai96 wrote:So for adiabatic system, the energy as heat is different from the energy as work? Thanks!

energy as heat is always separate from energy as work. For Adiabatic systems, since there is no heat transfer, q=0 and Delta U = w
by Brianna
Sat Jan 23, 2016 11:54 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Molar Heat Capacity Formula of Cp and Cv
Replies: 2
Views: 652

Re: Molar Heat Capacity Formula of Cp and Cv

When calculating Cv and Cp, the same equation is used except for the Cv calculation, you use 3/2R as the ideal gas constant and for the Cp calculation, you use 5/2R are the ideal gas constant. (This is for monoatomic molecules)
by Brianna
Sat Jan 16, 2016 10:18 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework Problem 63
Replies: 1
Views: 551

Homework Problem 63

When calculating the enthalpy for the reaction involving H20 (l) as when of the reactants, the solutions manual used the enthalpy of formation value for H20 (aq) instead on both part A and C. Is there a rule that we do not calculate reaction enthalpy with the enthalpy of liquor water, only aqueous?
by Brianna
Sun Jan 10, 2016 5:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework Problem 59
Replies: 1
Views: 315

Homework Problem 59

For this problem, the solutions manual has an answer which is somewhere in the 2000s and I have done the problem multiple times and ended up with an answer in the 3000s. I checked my work up util the final answer and it all seems to match what the manual has so I am wondering if the solution may be ...

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