Search found 20 matches
- Sun Mar 19, 2017 9:00 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Bond Angles of equatorials and axials
- Replies: 3
- Views: 1569
Re: Bond Angles of equatorials and axials
If the problem asks for the mot stable conformation, then you want to put the biggest substituents of the cyclohexane on the equatorial position.
- Sun Mar 19, 2017 8:35 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Two atoms are walking down the street.
Says one atom to the other, "Hey I think I lost an electron!"
The other says, "Are you sure?"
"Yes, I'm positive!"
Says one atom to the other, "Hey I think I lost an electron!"
The other says, "Are you sure?"
"Yes, I'm positive!"
- Sun Mar 19, 2017 8:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Q: What animal is made up of calcium, nickel and neon?
A: A CaNiNe
A: A CaNiNe
- Sun Mar 19, 2017 8:26 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
A: If you can't helium, and you can't curium, then you might as well barium.
- Sun Mar 19, 2017 8:25 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?
- Sun Mar 19, 2017 8:20 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Q: How did the chemist survive the famine?
A: By subsisting on titrations.
A: By subsisting on titrations.
- Sun Mar 19, 2017 8:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Q: What happened to the man who was stopped for having sodium chloride and a nine-volt in his car?
A: He was booked for a salt and battery.
A: He was booked for a salt and battery.
- Sun Mar 19, 2017 7:40 pm
- Forum: Resonance in Organic Compounds
- Topic: writing reaction rate laws [ENDORSED]
- Replies: 4
- Views: 3466
Re: writing reaction rate laws [ENDORSED]
If it doesn't cancel out then it is okay.
- Thu Mar 16, 2017 9:42 am
- Forum: *Alkenes
- Topic: Alkenes and Functional Groups
- Replies: 4
- Views: 1841
Re: Alkenes and Functional Groups
It would still be a pentane, any double bonds that are part of a functional group are only considered as part of that functional group. If you had a double bond elsewhere, that is when you change the name of the alkane to an alkene.
- Mon Mar 06, 2017 2:04 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: equation derivation
- Replies: 1
- Views: 1140
equation derivation
How is the equation Ea=delta H of activation + RT derived?
- Mon Mar 06, 2017 1:23 pm
- Forum: *Alkanes
- Topic: Drawing/Labeling reaction profile
- Replies: 3
- Views: 733
Re: Drawing/Labeling reaction profile
You would be able to tell that the reaction is exothermic precisely because the reactants have a higher energy level than the products do. In an exothermic reaction, energy is released when you form bonds. And when bonds are formed to make products, they are going to be more stable than the reactant...
- Thu Mar 02, 2017 2:20 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: the line with two crosses
- Replies: 1
- Views: 423
Re: the line with two crosses
I think it is the delta G/H, etc of the transition state.
- Thu Mar 02, 2017 2:17 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: HBr example from lecture
- Replies: 2
- Views: 1516
Re: HBr example from lecture
In this electrophilic addition example, I think the order does matter, because there are two transition states that need to be drawn for the two steps of the reaction. The nucleophile is first the hydrocarbon, so a pair of electrons goes toward the partially positive hydrogen in the electrophile HBr...
- Thu Feb 23, 2017 3:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Post All Chemistry Jokes Here
Q: What happened to the man who was stopped for having sodium chloride and a nine-volt in his car?
A: He was booked for a salt and battery.
A: He was booked for a salt and battery.
- Wed Feb 08, 2017 10:43 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 2763567
Re: Chemistry Jokes
A small piece of sodium that lived in a test tube fell in love with a Bunsen burner. "Oh Bunsen, my flame," the sodium pined. "I melt whenever I see you," The Bunsen burner replied, "It's just a phase you're going through."
- Thu Jan 26, 2017 6:45 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Equipartition Theorem
- Replies: 2
- Views: 618
Re: Equipartition Theorem
thank you!
- Thu Jan 26, 2017 6:15 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Equipartition Theorem
- Replies: 2
- Views: 618
Equipartition Theorem
Can someone explain the equipartition theorem and its applications?
- Wed Jan 18, 2017 2:44 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Work Integral Negative? [ENDORSED]
- Replies: 2
- Views: 562
Re: Work Integral Negative? [ENDORSED]
When the system is compressed, the formula has a negative sign and when the system is expanded it has a positive sign.
- Sun Jan 15, 2017 6:59 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy of Phase Changes
- Replies: 2
- Views: 506
Re: Enthalpy of Phase Changes
What about enthalpy being a state property makes it so that the reverse and forward processes for enthalpy changes are equal but with opposite signs?
- Fri Jan 13, 2017 10:59 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 7
- Views: 907
Re: Bond Enthalpies
In using this method, when a bond is formed do we write it as negative energy, and when a bond is broken, we write it as positive energy to add them up?