## Search found 15 matches

Fri Mar 11, 2016 5:24 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: 2015 Winter Final Question 3C
Replies: 1
Views: 520

### 2015 Winter Final Question 3C

"The volume of the lung before inhalation is 2.5L as there is always some air inside the lung. What is the air volume after inhalation at 37.0 celsius?"

Why do we add the 2.5L to .705L (the volume after expansion)?
Tue Mar 01, 2016 5:44 pm
Forum: *Cycloalkenes
Topic: HW Question: 1.21
Replies: 2
Views: 382

### Re: HW Question: 1.21

For this question, why would it not be 5-methyl-1,3 cyclopentadiene?
Sat Feb 27, 2016 4:36 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Transition States
Replies: 1
Views: 380

### Re: Transition States

I believe you always draw the two transition states for electrophilic addition and electrophilic aromatic substitutions reactions.
Sun Feb 21, 2016 7:42 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Psuedo rate Laws
Replies: 1
Views: 334

### Re: Psuedo rate Laws

The first appears to be a second order when one of the reactants in the rate equation is present in great excess over the other in the reaction and thus stays constant throughout the reaction. So the pseudo rate law is used,with the rate of the substance with the varying amount.
Sun Feb 14, 2016 8:11 pm
Forum: First Order Reactions
Topic: Textbook 15.23 Part A
Replies: 1
Views: 365

### Re: Textbook 15.23 Part A

I believe you put the 1/2, because the question asks to you find 1/2 of the amount that remains.
Sat Feb 06, 2016 4:56 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Entropy (total) in relation to Spontaneity
Replies: 1
Views: 273

### Entropy (total) in relation to Spontaneity

For the practice midterm 2013, number 6B part d, why does positive total Entropy translate to positive spontaneity?
Sun Jan 31, 2016 10:39 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Textbook Problem 11.19a
Replies: 1
Views: 277

### Textbook Problem 11.19a

In this problem we are given 2H2+O2->2H20. When calculating the Gibbs free energy of the equation, why does the solution omit H2 and O2 when adding up Gibbs from products- reactants?
Sun Jan 24, 2016 11:23 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Textbook Problem 8.77
Replies: 1
Views: 253

### Textbook Problem 8.77

In this problem, they use Benzene and want us to calculate bond enthalpies for the non resonance and resonance structures. My question is where do you get the resonance stabilized values?
Mon Jan 18, 2016 4:01 pm
Forum: Phase Changes & Related Calculations
Topic: Names for phase change from liquid to solid.
Replies: 2
Views: 349

### Re: Names for phase change from liquid to solid.

I believe it is enthalpy of freezing
Mon Jan 18, 2016 3:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8039
Views: 1410481

### Re: Chemistry Jokes

Q: What did one titration say to the other?
A: "Let's meet at the endpoint"
Sun Jan 10, 2016 3:41 pm
Forum: Phase Changes & Related Calculations
Topic: Figure 8.21 from book
Replies: 2
Views: 392

### Re: Figure 8.21 from book

I have the same question and does this have any correlation with the intermolecular forces of the phases?
Tue Nov 24, 2015 12:46 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Response of Equilibria to Change VIDEO
Replies: 3
Views: 565

### Re: Response of Equilibria to Change VIDEO

Hannah Ship 4H
.Mov version
Sun Oct 25, 2015 10:28 pm
Forum: Hybridization
Topic: S Character
Replies: 1
Views: 259

### S Character

How does s character relate to bond angles?
Sat Oct 17, 2015 11:43 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Repulsion
Replies: 1
Views: 271

### Repulsion

Why is it that regions of high electron density repel one another?
Sat Oct 10, 2015 1:19 pm
Forum: *Particle in a Box
Topic: Problems: Particle in a box & Probability of Finding E-'s
Replies: 3
Views: 1090

### Re: Problems: Particle in a box & Probability of Finding E-'

Conceptually, how does the wavefunction squared gives the probability of finding an electron?