Search found 13 matches
- Sat Mar 18, 2017 8:23 pm
- Forum: *Ketones
- Topic: Final 2015 #9b
- Replies: 1
- Views: 1308
Final 2015 #9b
Why do we use "hydroxy" to indicate the alcohol groups in naming #9b instead using the -ol ending?
- Sat Mar 18, 2017 7:48 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: Final 2011 #1c
- Replies: 1
- Views: 601
Final 2011 #1c
In Final 2011, #1c it asks for which has a greater residual entropy at 0K: NO or BF3.
The answer is NO, but I don't understand why.
Thank you.
The answer is NO, but I don't understand why.
Thank you.
- Sat Mar 18, 2017 5:09 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: (W 2010 Final )Which requires more heat?
- Replies: 2
- Views: 574
Re: (W 2010 Final )Which requires more heat?
Does the one mole of butane require more heat because it is larger in terms of atomic mass?
- Thu Mar 16, 2017 7:00 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Quiz 2
- Replies: 3
- Views: 1432
Quiz 2
On the last question for quiz #2, I stated that the rate limiting step was step 2, but got it wrong. I thought step 1 could not be the rate limiting step because it was at equilibrium, shown by the double arrows between the reactants and products. I don't understand why step 1 would have to be the r...
- Sat Mar 04, 2017 3:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29863
Re: Quiz 3 Winter 2017
For number 1, I wrote down 4-isopropyldecane as my answer, but I don't understand why it can also be 4-(1-methleythyl) decane
- Wed Mar 01, 2017 11:57 am
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Self Test 4.4 A
- Replies: 1
- Views: 446
Self Test 4.4 A
I don't understand why step one would have the larger Ea when the y-axis was labeled potential energy for part c.
Are the reaction profiles different when potential energy v. gibbs free energy is on the y-axis?
Thank you in advance!
Are the reaction profiles different when potential energy v. gibbs free energy is on the y-axis?
Thank you in advance!
- Sun Feb 26, 2017 7:32 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Reaction Profile
- Replies: 1
- Views: 514
Reaction Profile
What exactly is a reaction profile? There is not much information on it on the course reader and wondering if anyone would provide a better explanation?
Thank you.
Thank you.
- Sun Feb 12, 2017 10:12 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Problem 14.15
- Replies: 1
- Views: 559
Problem 14.15
Problem 14.15 in the textbook asks "Write the half-reactions and devise a galvanic cell (write a cell diagram) to study each of the following reactions." Part (b) is H(aq)+OH(aq) --> H2O(l), the Brønsted neutralization reaction. I don't understand how to get the half reactions for this r...
- Sun Feb 05, 2017 4:44 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Self-Test 14.13A
- Replies: 1
- Views: 550
Self-Test 14.13A
I was reading through the textbook and tried to solve out self test 14.13A on page 593. It says: "Predict the products resulting from the electrolysis of 1 m AgNO3(aq)." The answer is given to be [Cathode, Ag; anode, O2]. Even after reading the text and previous examples in the section, I ...
- Sun Jan 29, 2017 9:10 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: 9.13 Changes in Entropy
- Replies: 1
- Views: 469
9.13 Changes in Entropy
I had a question on 9.13. "During the test of an internal combustion engine, 3.00 L of nitrogen gas at 18.5 C was compressed suddenly (and irreversibly) to 0.500 L by driving in a piston. In the process, the temperature of the gas increased to 28.1 C. Assume ideal behavior. What is the change...
- Sun Jan 22, 2017 7:08 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Question 8.19
- Replies: 2
- Views: 474
Re: Question 8.19
Oh, I see! Thanks for your explanation.
- Sun Jan 22, 2017 6:58 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Question 8.19
- Replies: 2
- Views: 474
Question 8.19
I understand how to do part a in finding the amount of heat needed to raise the temperature of 400.0g of water in 500.0g copper kettlel from 22 to 100 degrees celsius. (q= 1.4 x 10^2 kJ) However, I don't understand what it means in part b when it asks for the percentage of the heat used to raise the...
- Sun Jan 15, 2017 4:15 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hw question 8.57
- Replies: 3
- Views: 677
Re: Hw question 8.57
In this specific question of the HW you need to use Hess's Law, since they give you information of the standard enthalpy of combustion of C 2 H 2 , C 2 H 6 , and H 2 . But I think you can use standard enthalpies of formation because I tried calculating and I got the same answer of -312 kJ/mol. You m...