Search found 24 matches
- Mon Mar 13, 2017 4:45 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: bond angles
- Replies: 2
- Views: 394
bond angles
I was wondering what the significance was of the bond angles since we keep talking about it. Is it basically that all the bond angles are 109.5 because the molecule is bound to 4 atoms? And angles less than that means there is strain and greater than that is something else? Thank you.
- Fri Mar 10, 2017 1:17 pm
- Forum: *Electrophiles
- Topic: Nucleophile vs Electrophile
- Replies: 5
- Views: 1439
Nucleophile vs Electrophile
I had a question on identifying if something was an electrophile or a nucleophile. Doesn't it depend on what the molecule is surrounded by rather than the molecule itself? Because couldn't a molecule be a nucleophile but if it is surrounded by different molecules it could be an electrophile? Thank y...
Re: priority
So does this also mean that alkynes have higher priority than alkenes?
priority
Hello, I was wondering to what extent we would have to know priority? I know that alkanes have priority over halogens but this wasn't really mentioned in the course reader. Thank you.
-Ajith Raja
-Ajith Raja
- Thu Feb 23, 2017 1:46 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Pre-Equilibrium Approach
- Replies: 2
- Views: 406
Pre-Equilibrium Approach
Hello, so the way I learned pre-equilibrium approach was to first write the rate law for the slow step. If there were intermediates in the rate law then you would continue, if not you were done. So does that mean if the slow step is the first step you are done after you write the rate law since you ...
- Sat Feb 11, 2017 1:19 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 14.11d Solution manual error [ENDORSED]
- Replies: 1
- Views: 361
14.11d Solution manual error [ENDORSED]
Hello for part d of 14.11 the book says that the more positive reduction half reaction potential was the anode. But I remember reading that the more positive reduction half reaction potential was always the cathode. Thank you.
- Tue Feb 07, 2017 2:05 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: delta G, K, and E [ENDORSED]
- Replies: 1
- Views: 387
delta G, K, and E [ENDORSED]
Hello so it seemed like all the equations for electrochemistry related G K and E together. Is this correct? Is there anything else that E relates to with an eq in the book that we have to know thats not in the course reader? Thank you.
- Mon Jan 30, 2017 9:28 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge
- Replies: 1
- Views: 296
Salt Bridge
Hello I was just wondering if the CL- in the salt bridge can ever run out. Also do the ions just stay in the solution? They also dont go onto the electrode correct? Thank you.
- Thu Jan 26, 2017 11:28 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: entropy and W
- Replies: 1
- Views: 322
entropy and W
Hello I was wondering that when we say if something has a higher entropy than something else, does this mean the W is also higher as well? Also whats the most complicated molecule level we should know how to find the degeneracy(W) of? Like are molecules like BOF2 high enough or should we know how to...
- Sat Jan 21, 2017 2:06 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta U=q+w
- Replies: 1
- Views: 325
delta U=q+w
So I was looking at the reversible expansion area in the course reader in Ch.9. There is a part where as the piston pushes out, heat comes in to replace the energy so delta U is 0 since there is no change in temp. But couldnt you also say that q=0 since q=CdeltaT would make q 0? Or does the mcat equ...
- Tue Jan 10, 2017 9:31 pm
- Forum: Phase Changes & Related Calculations
- Topic: expanding reversibly
- Replies: 2
- Views: 403
Re: expanding reversibly
But then if the pressure inside and outside match wouldn't the piston just stop expanding and not move? And when does the reversible process eventually have to travel in the opposite direction?
Thank you.
Thank you.
- Mon Jan 09, 2017 11:37 pm
- Forum: Phase Changes & Related Calculations
- Topic: expanding reversibly
- Replies: 2
- Views: 403
expanding reversibly
Hello, so for reversible processes, a small change in the external p would cause a piston to move in and vice versa. What I dont understand is in a reversible isothermal expansion why does the external pressure have to decrease ? Is it so the piston would continue to move outwards? Also the book is ...
- Fri Mar 11, 2016 10:12 pm
- Forum: *Chem3D
- Topic: conformations
- Replies: 1
- Views: 629
conformations
So for cyclohexane for example, the conformations are chair and boat correct? What do we need to know for these for the final? And do we have to know the conformations for bigger molecules like cycloheptane and octane? Thank you.
QUiz 3 #4
On the first quiz 3 prep #4 doesn't include the double bond in the parent chain. I thought the double bond was always in the parent chain.
- Sun Feb 28, 2016 2:28 pm
- Forum: *Alkanes
- Topic: Quiz 3/Quiz 3 prep
- Replies: 1
- Views: 362
Quiz 3/Quiz 3 prep
On #2 on the first quiz 3 prep it give the compound CH3CH(CH3)CH(CH2CH3)C(CH3)3. the answer is 3 ethyl-2,2,4 trimethyl pentane. But im confused as to why we dont count from the other side. I dont get when we order alphabetically and which one we give the lower number. Thank you Also will quiz 3 only...
- Tue Feb 16, 2016 11:52 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: K
- Replies: 3
- Views: 2808
K
Can someone help understand the constant K? Thank you. I greatly appreciate your help.
- Tue Feb 09, 2016 3:43 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: cell notation
- Replies: 1
- Views: 314
cell notation
So is the left side always the anode and the right side is always the cathode? Sometimes in the book they refer to it as the opposite way which confuses me.
- Sat Feb 06, 2016 1:13 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: cell notation
- Replies: 1
- Views: 785
cell notation
When you have multiple aqueous species separated by a comma, does it matter what order you write them in?
- Fri Feb 05, 2016 7:38 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: half cell
- Replies: 1
- Views: 307
half cell
Can someone help me get a better understanding of a half cell? Im still confused on what it is after reading the book and the internet. Is it just an electrolyte solution with a "metal rod" thats a different metal than the one in the solution?
- Wed Feb 03, 2016 8:29 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta H and bond enthalpy
- Replies: 1
- Views: 771
delta H and bond enthalpy
Im confused on the difference between delta H and bond enthalpy. On some problems we use the delta H of the reaction and use products -reactants but on other problems we change the signs because of the energy required or lost from bonds broken and formed.
- Sat Jan 23, 2016 3:27 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: delta S
- Replies: 4
- Views: 676
Re: delta S
But I remember hearing that when temperature is zero, than delta S is also 0. Or is that wrong.
- Fri Jan 22, 2016 4:59 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: delta S
- Replies: 4
- Views: 676
delta S
If delta S equals delta H/ temperature, does that mean the more you decrease temperature the higher delta S is?
- Mon Jan 18, 2016 4:41 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: HW 8.25
- Replies: 4
- Views: 753
Re: HW 8.25
On the solutions manual, the change in temperature that is used is given in Kelvin. For example, they use 7.32K. However, in the problem, the temperature is given in Celsius. Don't we have to convert Celsius to Kelvin before we continue with the problem? If so, why is it not done in the solutions ma...
- Wed Jan 13, 2016 9:45 pm
- Forum: Phase Changes & Related Calculations
- Topic: delta U
- Replies: 2
- Views: 921
delta U
Can someone help me understand what delta U is? Thank you