Search found 27 matches
- Sat Mar 18, 2017 12:39 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Thursday Review Session Powerpoint 6-7PM
- Replies: 7
- Views: 1417
Re: Thursday Review Session Powerpoint 6-7PM
Thank you! I've been waiting for this (:
- Sat Mar 18, 2017 12:36 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge [ENDORSED]
- Replies: 4
- Views: 1196
Re: Salt Bridge [ENDORSED]
I think I remember Dr. Lavelle saying that the porous disk is one line when he was making announcements about our midterm, however I'm not too sure.
- Tue Mar 14, 2017 2:25 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
As our final is getting closer, I wish everyone good luck and
- Tue Mar 14, 2017 2:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Formula Sheet for the Final Exam
- Replies: 5
- Views: 1072
Re: Formula Sheet for the Final Exam
The formula sheet for the final would be identical to the back of the periodic table that you got with your course reader and also within your course reader. Also, I'm sure there will be values such as heat capacity and such given too.
- Tue Mar 07, 2017 11:35 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Winter 2017
- Replies: 183
- Views: 29753
Re: Quiz 3 Winter 2017
Jocelyn_Dao_2N wrote:Why is the answer for number 4, 4-butyl-1,2-dimethylcyclohexane and not 1,butyl-3,4-butylcyclohexane?
When naming, once you get a lower number, then that's it. Since 2 is smaller than 3, then the name of the compound should be the one that includes the 2, not the 3.
- Tue Mar 07, 2017 11:19 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Question on Actual Quiz 2
- Replies: 2
- Views: 718
Re: Quesion on Actual Quiz 2
The smaller the rate constant, the slower the reaction and vice versa. So given that k1 << k2, k1 is much smaller than k2 thus implying that the reaction rate for step 1 would be slower than that of step 2.
- Wed Mar 01, 2017 6:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
Me taking Chem 14B
- Thu Feb 23, 2017 1:02 pm
- Forum: General Rate Laws
- Topic: Units for Reaction Rate and the Rate Constant
- Replies: 3
- Views: 1194
Re: Units for Reaction Rate and the Rate Constant
The unit for the reaction rate is generally mol*L^-1*s^-1 or M*s^-1 for which M is mol*L-1. As for the units for the rate constant, it depends on the order of the reaction. For zero-order reactions, the units are mol*L^-1*s^-1 or M*s^-1 like the reaction rate. For first-order reactions, the units ar...
- Wed Feb 15, 2017 1:27 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Reversible vs. Irreversible [ENDORSED]
- Replies: 4
- Views: 1102
Re: Reversible vs. Irreversible [ENDORSED]
For the calculations for work, it is affected in the formulas for irreversible expansion and reversible expansion. For irreversible expansion, work is equal to negative pressure times delta V while reversible expansion is equal to negative nRT times the natural log of V2 over V1.
- Wed Feb 15, 2017 1:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Winter 2017
- Replies: 87
- Views: 21113
Re: Midterm Winter 2017
Is KNSY PV the Kinsey Pavillion near the inverted fountain?
- Wed Feb 08, 2017 3:11 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Heating Curves
- Replies: 1
- Views: 582
Re: Heating Curves
I think it would be beneficial to know and understand what a heating curve is. A heating curve is a graph showing the temperature of a substance (y-axis) plotted against the amount of energy it absorbs (x-axis). A substance must absorb heat energy so that it can melt or boil. The temperature of the ...
- Thu Feb 02, 2017 3:03 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: When entropy=0 [ENDORSED]
- Replies: 3
- Views: 837
Re: When entropy=0 [ENDORSED]
In the textbook, question 21 of chapter nine asks you to calculate the entropy of a solid nanostructure made of 64 molecules in which the molecules are aligned in the same direction. Since it is only arranged in one way, W would be 1^64 which would equal 1 and plug it into the equation for entropy a...
- Thu Jan 26, 2017 1:58 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Will we be given equation sheet on quiz?
- Replies: 2
- Views: 653
Re: Will we be given equation sheet on quiz?
I think we'll be given equations like last quarter where the equations given were pretty much specific to that quiz or concept. I'm not sure which equations we will be given.
What equations should we know and memorize? And which ones will be given to us?
What equations should we know and memorize? And which ones will be given to us?
- Fri Jan 20, 2017 10:49 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Work is not a state function [ENDORSED]
- Replies: 3
- Views: 2339
Re: Work is not a state function [ENDORSED]
Work is not a state function be use it is path dependent so it matters which route you take. Since displacement is needed, it is not a state function. The work you put into getting up to your dorm room by walking around the building, then to Bcafe, and up the stairs is different from the work of jus...
- Fri Jan 13, 2017 5:04 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: standard enthalpy
- Replies: 1
- Views: 440
Re: standard enthalpy
Standard state is basically the state of a substance or elements at room temperature. State being solid, Iiquid, or gas. For example, oxygen is a gas in its standard state which is O2 at room temperature where it's stable.
- Fri Dec 02, 2016 12:00 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."
- Sat Nov 26, 2016 3:35 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
Q: Why do chemistry professors like to teach about ammonia? A: Because it's basic material. Q: Why did the noble gas cry? A: Because all his friends Argon Q: Did you hear about the man who got cooled to absolute zero? A: He's 0K now Q: Why are chemists great for solving problems? A: They have all th...
- Sun Nov 20, 2016 3:00 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Kc vs Kp and all the other constants
- Replies: 2
- Views: 772
Re: Kc vs Kp and all the other constants
Kc and Kp are the equilibrium constants of gaseous mixtures but the difference between them is that Kc is defined by molar concentrations, whereas Kp is defined by the partial pressures of the gasses inside a closed system. I think that for Kp it should be all gases in the reaction whereas for Kc th...
- Sun Nov 20, 2016 2:54 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
Q: Why did Carbon marry Hydrogen?
A: They bonded well from the minute they met.
Q: Why did Chlorine's sisters Boron and Carbon lock her in the closet?
A: Because she was too attractive!
Hilarious
A: They bonded well from the minute they met.
Q: Why did Chlorine's sisters Boron and Carbon lock her in the closet?
A: Because she was too attractive!
Hilarious
- Sun Nov 13, 2016 12:50 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
Two chemists go into a restaurant. The first one says "I think I'll have an H2O." The second one says "I think I'll have an H2O too" -- and he died. A small piece of sodium that lived in a test tube fell in love with a Bunsen burner. "Oh Bunsen, my flame," the sodium pi...
- Fri Nov 04, 2016 1:54 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
Have you heard the one about a chemist who was reading a book about helium?
He just couldn't put it down.
Why do chemists like nitrates so much?
They're cheaper than day rates.
He just couldn't put it down.
Why do chemists like nitrates so much?
They're cheaper than day rates.
- Wed Oct 26, 2016 11:58 pm
- Forum: Lewis Structures
- Topic: Quiz 2 Prep Question #7
- Replies: 2
- Views: 790
Quiz 2 Prep Question #7
For question #7 on the quiz 2 prep, I don't understand why the Lewis structure of XeO2F2 would be allowed for Xe as a central atom but not for Ne as a central atom. What exactly is it asking? The problem states: Draw the Lewis structure for XeO2F2. Explain why this structure would be allowed for Xe ...
- Thu Oct 20, 2016 12:17 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3622763
Re: Post All Chemistry Jokes Here
These are somewhat depressing...
What do you do with a dead chemist?
-Barium
Little Willie was a chemist. Little Willie is no more. What he thought was H2O was H2SO4.
I asked the guy sitting next to me if he had any Sodium Hypobromite and he said "NaBrO"
What do you do with a dead chemist?
-Barium
Little Willie was a chemist. Little Willie is no more. What he thought was H2O was H2SO4.
I asked the guy sitting next to me if he had any Sodium Hypobromite and he said "NaBrO"
- Wed Oct 12, 2016 11:33 pm
- Forum: Balancing Chemical Reactions
- Topic: Balancing Chemical equations too slow... any advice? [ENDORSED]
- Replies: 18
- Views: 3993
Re: Balancing Chemical equations too slow... any advice? [ENDORSED]
My TA said to balance out the biggest number on the reactant side first and the smallest last. So whichever atom has the highest number, balance that out first.
- Fri Oct 07, 2016 8:05 am
- Forum: Administrative Questions and Class Announcements
- Topic: Workbook - Quiz 1
- Replies: 2
- Views: 613
Re: Workbook - Quiz 1
Ok thank you. I accidentally flipped through the quiz that didn't have the answers so I didn't see it.
- Thu Oct 06, 2016 12:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Workbook - Quiz 1
- Replies: 2
- Views: 613
Workbook - Quiz 1
Do we just complete the self-test, the quiz 1 preps, and then hand the workbook to our TA? Also, there are answers for every quiz prep except for the last quiz 3 prep so how does that work when the workbook gets graded?
- Mon Sep 26, 2016 10:10 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Fundamentals E.21: Amount in moles vs Number of molecules vs Formula units
- Replies: 5
- Views: 4103
Fundamentals E.21: Amount in moles vs Number of molecules vs Formula units
I was going through the Fundamentals section and formula units kept on popping up. For example, in problem E.21, it asks to calculate the amount in moles and the number of molecules and formula units in a 10.0 g of alumina. Will someone explain to me the difference between number of moles, molecules...