## Search found 12 matches

Thu Mar 16, 2017 1:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Details and Review Sessions Winter 2017
Replies: 114
Views: 17796

### Re: Final Exam Details and Review Sessions Winter 2017

Will the final be more heavily concentrated on material we learned in the 2nd half of the class? Or will there be a generally equal distribution of questions from the beginning of the quarter through now?
Sun Feb 19, 2017 11:56 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation with ln vs. log
Replies: 2
Views: 1761

### Re: Nernst Equation with ln vs. log

I heard that using log is the standard way, but seeing that we have to memorize the 0.0592 value, isn't it simpler to use ln instead?
Sun Feb 12, 2017 11:36 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy
Replies: 3
Views: 427

### Re: Entropy

How do you know how many times a Lewis structure can be arranged?
Sun Jan 22, 2017 3:33 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW Problem 8.75b
Replies: 2
Views: 295

### Re: HW Problem 8.75b

In Bond Enthalpy problems like this one, how do we decide which bonds are broken? For example in 8.75b why aren't the C--H bonds and the C--C bonds broken? Thanks.
Thu Jan 12, 2017 3:52 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Reaction Enthalpies
Replies: 1
Views: 246

### Reaction Enthalpies

Through Hess's Law we know that the total enthalpy change of a reaction is equal to the sum of the all the enthalpy changes in the steps of the reaction. But we also know that the standard reaction enthalpy is equal to the difference between the ∆Hf˚(products) and the ∆Hf˚(reactants). So when a prob...
Sun Nov 27, 2016 11:00 pm
Forum: Student Social/Study Group
Topic: Midterm over!!
Replies: 11
Views: 1652

### Re: Midterm over!!

The midterm is not curved. Only at the end of the quarter when all the points are accumulated there is a slight curve. I don't think your final grade will be affected that much by the curve unless you have lower than a C or D and you need to pass the class. This is true. And Professor Lavelle also ...
Wed Nov 16, 2016 11:04 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Valence-shell configuration and periodic trends
Replies: 2
Views: 294

### Re: Valence-shell configuration and periodic trends

What does it mean to have overlapping atomic orbitals? What is meant by the greater splitting energy that results in more overlapping?
Sun Nov 06, 2016 5:33 pm
Forum: Biological Examples
Topic: Important Metals for Biology [ENDORSED]
Replies: 4
Views: 8228

### Re: Important Metals for Biology[ENDORSED]

What makes a metal a complex metal? Which are the notable ones we should know about?
Thu Oct 27, 2016 6:18 pm
Forum: Lewis Structures
Topic: Formal Charge
Replies: 3
Views: 365

### Re: Formal Charge

If we are asked to give the formal charges for each atom of a Lewis Structure, do we give the average of the formal charges? Are we supposed to know which elements get exclude from resonance (ex. Sulfur since it is harder to form a double bond with it?)
Sun Oct 23, 2016 10:09 pm
Forum: Trends in The Periodic Table
Topic: d-block electron configuraitons
Replies: 4
Views: 659

### Re: d-block electron configuraitons

I need clarification on finding the electron configuration of Pb. Can someone explain how we get 4f14 as part of it? Thank you.
Sun Oct 09, 2016 10:52 pm
Forum: SI Units, Unit Conversions
Topic: kJ vs. J
Replies: 4
Views: 701

### kJ vs. J

Because kJ is an SI base unit, should we always assume that an answer should be in kJ versus J even if the given information in the question is given in J?
Fri Sep 30, 2016 3:03 pm
Forum: Administrative Questions and Class Announcements
Topic: Video Modules vs. Bruincast [ENDORSED]
Replies: 1
Views: 236

### Video Modules vs. Bruincast[ENDORSED]

What is the difference between Lavelle's bruincast videos and the video modules on the class website? Is one more helpful than the other?

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