Search found 15 matches
- Wed Mar 09, 2016 10:46 pm
- Forum: *Alkenes
- Topic: Multiple Double Bonds
- Replies: 1
- Views: 503
Re: Multiple Double Bonds
That is fine. You can also put the numbers in front of the parent chain name if its a more simple molecule.
- Wed Mar 09, 2016 10:43 pm
- Forum: *Electrophilic Addition
- Topic: Picking out Intermediates
- Replies: 1
- Views: 662
Re: Picking out Intermediates
The first step of the two step reaction may have two products. For example a Br- ion and an organic compound with a positive charge on one of the carbons may be the two intermediaries of a two step reaction.
- Wed Mar 02, 2016 5:51 pm
- Forum: *Alkanes
- Topic: Nucleophile vs electrophile
- Replies: 2
- Views: 556
Re: Nucleophile vs electrophile
Carbonyls are also electrophiles even though the don't necessarily look like them.
- Wed Mar 02, 2016 5:47 pm
- Forum: *Cycloalkanes
- Topic: Numbering Carbons
- Replies: 3
- Views: 809
Re: Numbering Carbons
Double and triple bonds have priority over substituents and should always be given the lowest possible number. For substituents, you give priority to them based on alphabetical order. Alphabetical order does not include any of the prefixes (di, tri, etc.) and it does not include the common prefixes ...
- Wed Mar 02, 2016 5:42 pm
- Forum: *Cycloalkanes
- Topic: Quiz 3 First Preparation #5
- Replies: 1
- Views: 519
Quiz 3 First Preparation #5
Question #5 shows a cycloalkene with iodine and bromine attached and asks you to name it. I named the compound 1-bromo-3-iodo cyclohexane, because I thought that the substituents should be placed in alphabetical order and if there was a "tie", you named the one alphabetically first with th...
- Fri Feb 19, 2016 5:18 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3611392
Re: Chemistry Jokes
A cloud of helium floats into a bar. The bartender says, "Hey! We don't serve noble gases here."
The helium does not react.
The helium does not react.
- Fri Feb 19, 2016 5:07 pm
- Forum: Experimental Details
- Topic: Pre Equilibruim Approach
- Replies: 6
- Views: 1719
Re: Pre Equilibruim Approach
The pre-equilibirum approach uses a psuedo-equilibrium situation where one of the steps of the reaction is said to be at equilibrium and set equal to K, the equilibirum constant. This equation involving K is then manipulated and subsituted into the other reaction rate equation, so that the the react...
- Thu Feb 04, 2016 12:31 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation Numbers for O2 and O3
- Replies: 1
- Views: 7280
Re: Oxidation Numbers for O2 and O3
The oxidation number for elements in their natural forms is zero because these compounds are extremely stable. The oxidation number represents the number of electrons the element can give away (if positive) or lose (if negative). Such stable molecules have no electrons to lose or gain. The oxidation...
- Sun Jan 24, 2016 5:07 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Why does isothermal mean no change in internal energy?
- Replies: 2
- Views: 724
Why does isothermal mean no change in internal energy?
Why is it that if something is isothermal, that the change in U is zero? I was trying to derive this from the equations we learned in class, but I can't seem to remember/figure it out. Thanks!
- Fri Jan 15, 2016 4:50 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Constant Volume & Internal Energy
- Replies: 1
- Views: 394
Constant Volume & Internal Energy
How does constant volume, as opposed to constant pressure, Internal Energy? On page 25 of the course reader it states then if the change in V=0, then the Change in U=qv, but I'm not really sure what qv means.
- Thu Jan 07, 2016 3:58 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law Enthalpy-Textbook Error? Or am I lost?
- Replies: 2
- Views: 772
Re: Hess's Law Enthalpy-Textbook Error? Or am I lost?
Completely forgot to balance that 2nd equation. Thank you!
- Thu Jan 07, 2016 3:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law Enthalpy-Textbook Error? Or am I lost?
- Replies: 2
- Views: 772
Hess's Law Enthalpy-Textbook Error? Or am I lost?
While working on homework problem 8.55, I noticed that I was having trouble canceling out the two given standard reactions to get the reaction enthalpy for the production of metallic barium. When I checked the solutions manual, the 2nd equation was listed as 2Al(s) + 3/2O2(g) --> Al203(s) instead of...
- Mon Nov 23, 2015 9:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Video: Equilibrium Concentration Fall 2012 Q6A
- Replies: 3
- Views: 733
Video: Equilibrium Concentration Fall 2012 Q6A
A video by Katherine Jabba(3I), Erik Whitney (3G), and Carolyn Stephens (3H) explaining an equilibrium concentration problem (#6A) from the Fall 2012 Final Exam. We hope this helps any students who are confused! Question: A vial of SO2 (0.522 M) and O2 (0.633 M) react and reach equilibrium. Calculat...
- Sun Oct 11, 2015 10:15 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Relevance of Electron Spin
- Replies: 1
- Views: 639
Relevance of Electron Spin
I understand how electron spins work, and the rules associated with pairing electrons and their spins. However, I don't understand what electron spins truly mean, and the role they play in the makeup of the atom.
- Fri Oct 02, 2015 5:25 pm
- Forum: Properties of Electrons
- Topic: Relevance/Difference btwn the series of hydrogen constants?
- Replies: 1
- Views: 4155
Relevance/Difference btwn the series of hydrogen constants?
Could someone explain the differences between the Lyman, Balmer, Paschen, and Brackett series? I know that they consecutivley begin with n=1, n=2, n=3, and n=4, but I don't understand exactly what that actually means in terms of the hydrogen atom.