Search found 54 matches
- Sun Mar 18, 2018 5:23 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Stoichiometric coefficients
- Replies: 4
- Views: 879
Re: Stoichiometric coefficients
only for elementary steps
- Sun Mar 18, 2018 5:22 pm
- Forum: Calculating Work of Expansion
- Topic: Conversion of R
- Replies: 7
- Views: 999
Re: Conversion of R
youll use 8.314 most of the time but whenver the units are L.atm then you use 8.206
- Sun Mar 18, 2018 5:21 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: complex molecules
- Replies: 8
- Views: 1655
Re: complex molecules
the more complex a molecule is, the more entropy it has
- Sun Mar 18, 2018 5:16 pm
- Forum: General Rate Laws
- Topic: rate law
- Replies: 6
- Views: 981
Re: rate law
you dont use products in the rate law but you have the right idea with the coefficients
- Sun Mar 18, 2018 5:14 pm
- Forum: *Nucleophiles
- Topic: SN2 Reactions
- Replies: 4
- Views: 3573
Re: SN2 Reactions
yes you need to know
- Sun Mar 18, 2018 5:12 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Spontaneity in a cell reaction
- Replies: 4
- Views: 849
Re: Spontaneity in a cell reaction
dG=-nFE
E is standard cell potential that needs to be positive so that dG could be negative, which is what we want for spontaneity
E is standard cell potential that needs to be positive so that dG could be negative, which is what we want for spontaneity
- Sun Mar 18, 2018 5:10 pm
- Forum: General Rate Laws
- Topic: Rate constant units
- Replies: 6
- Views: 1220
Re: Rate constant units
write it all out and cancel whatever you can. whats left is your units
- Sun Mar 18, 2018 5:09 pm
- Forum: Student Social/Study Group
- Topic: How often do I actually find Chemistry jokes funny?
- Replies: 2
- Views: 529
- Sun Mar 18, 2018 5:08 pm
- Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
- Topic: Final
- Replies: 3
- Views: 1486
Re: Final
yea from both. its not too bad
- Sun Mar 18, 2018 5:07 pm
- Forum: General Rate Laws
- Topic: The Collision Model and Activated Complex Model
- Replies: 3
- Views: 774
Re: The Collision Model and Activated Complex Model
for activated complex, basically you have an electonegative atom break off from a molecule and another electronegative atom come to bond with the molecule. You use dotted lines to represent broken/formed bonds
- Sun Mar 18, 2018 5:04 pm
- Forum: Balancing Redox Reactions
- Topic: Winter 2013 final Q4
- Replies: 9
- Views: 1150
Re: Winter 2013 final Q4
course readers^
- Sun Mar 18, 2018 5:03 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Putting an Ice cube into a glass of water
- Replies: 4
- Views: 1371
Re: Putting an Ice cube into a glass of water
you do need dH of fusion
- Sun Mar 18, 2018 5:02 pm
- Forum: *Carboxylic Acids
- Topic: Functional Groups
- Replies: 5
- Views: 2520
Re: Functional Groups
Just memorize the six we learned and you solid
- Sun Mar 18, 2018 5:02 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Spontaneity question
- Replies: 7
- Views: 1016
Re: Spontaneity question
dG=dH-TdS
keep dG negative to maintain spontaneity
keep dG negative to maintain spontaneity
- Sun Mar 18, 2018 5:00 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam
- Replies: 7
- Views: 1196
Re: Steam
technically anything at 100 C would cause a severe burn
- Sun Mar 18, 2018 4:59 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Phase changes and entropy
- Replies: 5
- Views: 865
- Sun Mar 18, 2018 4:57 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 11
- Views: 2040
Re: Final
I agree with kyle
- Sun Mar 18, 2018 4:57 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Catalyst and Intermediate
- Replies: 7
- Views: 1028
Re: Catalyst and Intermediate
catalysts are usually in the reactants of the first step and the products of the second step. Intermediates is the other way around
- Sun Mar 18, 2018 4:56 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 514019
Re: Saying Thank You to Dr. Lavelle
Dr. Lavelle
You da real mvp
Yours truly
You da real mvp
Yours truly
- Sun Mar 18, 2018 4:55 pm
- Forum: General Rate Laws
- Topic: 15.85 Drawing structures for activated complex
- Replies: 3
- Views: 853
Re: 15.85 Drawing structures for activated complex
Activated complex is the transition state of a reaction. Basically, an electronegative atom breaks off from a molecule and a nucleophile comes to take its place. In the transition state, you would use dotted lines to represent formed/broken bonds. This is what people refer to as the double dagger
- Sun Mar 18, 2018 4:51 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Is enthalpy a state function?
- Replies: 12
- Views: 2178
Re: Is enthalpy a state function?
si senor
- Sun Mar 11, 2018 1:51 am
- Forum: General Science Questions
- Topic: born haber cyle
- Replies: 1
- Views: 619
born haber cyle
do we need to know the born haber cycle?
- Sun Mar 11, 2018 1:50 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: standard cell potential
- Replies: 1
- Views: 257
standard cell potential
when adding standard cell potentials, why do you need to convert standard cell potential to gibbs free energy and then convert back to standard cell potential instead of adding them straight up??
- Sun Mar 11, 2018 1:48 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: reversible/irreversible
- Replies: 2
- Views: 375
reversible/irreversible
can anyone explain the difference between reversible and irreversible expansion? are there specific formulas for each conditions?
- Mon Feb 26, 2018 1:39 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What is it called when Queen of England farts?
A noble gas
A noble gas
- Mon Feb 26, 2018 1:33 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Why did the acid go to the gym?
To become a buffer solution!
To become a buffer solution!
- Mon Feb 26, 2018 1:32 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
How do Sulfur and Oxygen communicate?
a sulfone
a sulfone
- Sun Feb 11, 2018 9:11 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
what did one cell say to his sister cell that stepped on his toe?
mitosis
mitosis
- Sun Feb 11, 2018 9:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
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."
- Sun Feb 11, 2018 9:04 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
what do you call a wheel made of iron?
a ferrous wheel
a ferrous wheel
- Sun Feb 04, 2018 7:38 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
When one physicist asks another, "What's new?" what's the typical response?
C over lambda
C over lambda
- Sun Feb 04, 2018 7:34 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Why do chemists like nitrates so much?
They're cheaper than day rates.
They're cheaper than day rates.
- Sun Feb 04, 2018 7:33 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?
- Fri Jan 26, 2018 11:42 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
I have many chemistry jokes. I'm just afraid they wont get a good reaction
- Fri Jan 26, 2018 11:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
what is the chemical formula for banana?
BaNa2
BaNa2
- Fri Jan 26, 2018 11:39 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
what kind of dogs do chemists have?
laboratory retrievers
laboratory retrievers
- Sat Jan 20, 2018 5:40 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Standard Enthalpy of Formation
- Replies: 3
- Views: 379
Re: Standard Enthalpy of Formation
standard enthalpy of formation is the enthalpy for a single mol compared to say a reaction enthalpy where it is an enthalpy of a whole reaction
- Sat Jan 20, 2018 5:32 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 8.49
- Replies: 2
- Views: 305
Re: 8.49
to add on to the comment before, it is also when delta p=0
- Sat Jan 20, 2018 5:31 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: J vs. kJ [ENDORSED]
- Replies: 4
- Views: 416
Re: J vs. kJ [ENDORSED]
i think joules is recommended because the formula sheet uses joules for a lot of the formulas but you can use either j or kj as long as youre consistent
- Fri Jan 12, 2018 11:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What did the thermometer say to the graduated cylinder?
At least I have a degree
At least I have a degree
- Fri Jan 12, 2018 11:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
If a king farts, is it a noble gas?
- Fri Jan 12, 2018 11:42 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What kind of fish is made out of two sodium atoms?
2 Na
2 Na
- Sun Dec 10, 2017 3:24 pm
- Forum: Coordinate Covalent Bonds
- Topic: transition metals
- Replies: 3
- Views: 1125
Re: transition metals
so how do you use that to determine how many electrons a metal can have on a lewis structure?
- Sun Dec 10, 2017 3:22 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Memorizing
- Replies: 3
- Views: 583
Re: Memorizing
im late but i wouldve said everything about vsepr
- Mon Nov 27, 2017 6:24 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What is the name of agent 007's Eskimo cousin? Polar Bond.
- Mon Nov 27, 2017 6:23 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Why do chemists enjoy working with ammonia? Because it's pretty basic stuff.
- Sun Nov 05, 2017 11:54 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What kind of fish is made out of 2 sodium atoms?
2Na
2Na
- Sun Nov 05, 2017 11:49 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Why do chemistry professors like to teach about ammonia?
Because it's basic material.
Because it's basic material.
- Sun Oct 29, 2017 8:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
What do you do with a sick chemist?
If you can't helium, and you can't curium, then you might as well barium.
If you can't helium, and you can't curium, then you might as well barium.
- Sun Oct 29, 2017 8:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Did you know that you can cool yourself to -273.15˚C and still be 0k?
- Fri Oct 13, 2017 2:41 pm
- Forum: DeBroglie Equation
- Topic: Should velocity always be in m.s. when solving? [ENDORSED]
- Replies: 11
- Views: 1942
Re: Should velocity always be in m.s. when solving? [ENDORSED]
I would play it safe and use m.s
- Fri Oct 13, 2017 2:37 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Are you full of Beryllium, Gold, and Titanium?
Because you're BeAuTi-ful ;)
Because you're BeAuTi-ful ;)
- Fri Oct 06, 2017 9:51 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3011265
Re: Post All Chemistry Jokes Here
Lmao these are pretty good
- Fri Oct 06, 2017 9:47 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 147111
Re: Reading the textbook
I should start reading the textbook more...