## Search found 10 matches

Sun Mar 12, 2017 11:53 pm
Forum: *Alkanes
Topic: Condensed Structural Formula
Replies: 1
Views: 278

### Condensed Structural Formula

Can substituents also be included in parenthesis in the condensed structural formula or only atoms in the parent chains?

Tue Feb 28, 2017 11:09 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Pseudo-Equilibrium Constant
Replies: 1
Views: 375

### Pseudo-Equilibrium Constant

In the course reader (pg.86) the Pseudo-Equilibrium Constant(K) is equal to [AB]/[A][B]. I don't understand why the intermediate ([AB]) is being used instead of [C], which is listed at the product in the reaction given. The true K is [P]/[R]. The equation given in the course reader is A + B <--> AB ...
Tue Feb 28, 2017 10:58 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Catalyst
Replies: 6
Views: 753

### Re: Catalyst

Page 76 in the course reader is pretty helpful when it comes to important information about catalysts.
Mon Feb 27, 2017 10:38 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics vs. Thermodynamics
Replies: 3
Views: 547

### Re: Kinetics vs. Thermodynamics

Think of it this way, graphite and diamond are both made of carbon, and graphite has a lower free energy, so diamond wants to convert into graphite. However, although the reaction should proceed this way (the product(graphite) is more stable that the reactant(diamond) ), it doesn’t. The reaction des...
Mon Feb 27, 2017 10:03 pm
Forum: Administrative Questions and Class Announcements
Topic: 2/24/17 Bruincast
Replies: 19
Views: 2482

### Re: 2/24/17 Bruincast

Yes! Bruincast for 2/24/17 seems to working now.
Tue Feb 14, 2017 8:19 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Midterm Winter 2013 Problem 5B
Replies: 1
Views: 268

### Re: Midterm Winter 2013 Problem 5B

The way I think of entropy is that larger molecules have greater entropy than smaller molecules. This is because the more atoms there are in a molecule, the the more disorder there is. In other words, in a larger molecule there are more combinations for the atoms to arrange themselves in, resulting ...
Tue Feb 14, 2017 8:07 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Midterm 2012 Q1B
Replies: 1
Views: 320

### Midterm 2012 Q1B

Q: Hexamine is a white solid sometimes used as a fuel by campers. When 1.500g of hexamine (deltaH(subscript c)= -42.00 x 10^2 kj/mol) is burned in a bomb calorimeter, the temperature of the system increases from 25.243 degrees celsius to 26. 975 degrees celsius. What is the heat capacity of the bomb...
Sun Feb 05, 2017 7:55 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Quiz 1 Preparation Practice Quiz from 2010
Replies: 2
Views: 361

### Re: Quiz 1 Preparation Practice Quiz from 2010

(posting here because I'm having trouble making my own post, sorry for any inconvenience) From Quiz Preparation 1, 2016 The questions states, "A system undergoes a two step process. In step 1, it expands adiabatically from 1 L to 2.56 L at 1.00 atm (external pressure). In step 2, it releases 73...
Sun Jan 29, 2017 9:44 pm
Forum: Calculating Work of Expansion
Topic: max amount of work
Replies: 4
Views: 522

### Re: max amount of work

(Having trouble posting my own post, so I'm using this one to ask a slightly similar question--sorry for any confusion)

What is the difference between a real system and a perfect system?

Thank You!
Sun Jan 22, 2017 7:55 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Degeneracy and Entropy
Replies: 1
Views: 307

### Re: Degeneracy and Entropy

Ksub-b is the Boltzmann constant that is given to us on the back of the Dr. Lavelle's periodic table. It is 1.38065x10^-23 J.K^-1.