Search found 20 matches
- Sat Mar 18, 2017 10:14 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst Equation
- Replies: 3
- Views: 658
Re: Nernst Equation
No it can be at any temperature. Only the Nernst Equation that is E=E(standard)- (.05916)/n)*logQ needs to be at 298K.
- Sat Mar 18, 2017 10:08 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Winter 2013 Final 1B
- Replies: 4
- Views: 808
Re: Winter 2013 Final 1B
If volume increases and temperature decreases, pressure MUST decrease to satisfy the PV=nRT equation, so there's actually no way pressure would have been constant. With that said, the above post is correct.
- Fri Mar 17, 2017 10:23 pm
- Forum: *Alkenes
- Topic: Cyclohexene example in course reader [ENDORSED]
- Replies: 1
- Views: 1317
Cyclohexene example in course reader [ENDORSED]
On page 102 of the course reader, there are more IUPAC naming examples of alkenes. The third example is named 1,6-dichlorocyclohexene. Why is it not 1,2-dichlorocyclohexene?
- Wed Mar 15, 2017 8:04 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Order When Naming
- Replies: 1
- Views: 669
Order When Naming
When naming a cyclohexane that has 1 ethyl and 2 methyl substituent on either the 1st or 3rd carbon, would you put the 1 with the ethyl and the 3 with the methyl or the other way around? (Is it 1-ethyl-3,3-dimethyl-cyclohexane or 3-ethyl-1,1-dimethyl-cyclohexane?)
- Mon Feb 27, 2017 5:31 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Determining Slow Step
- Replies: 1
- Views: 494
Determining Slow Step
When comparing the K of two different reactions, does the larger K mean a faster or slower reaction?
- Wed Feb 15, 2017 10:28 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
Re: Post All Chemistry Jokes Here
Q: Why was the mole of oxygen molecules excited when he left the singles bar?
A: He got Avogadro's number!
A: He got Avogadro's number!
- Fri Feb 10, 2017 9:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
Re: Post All Chemistry Jokes Here
An atom says, "I think I lost an electron." His friend asks, "Are you sure?" and the atom replies, "I'm positive."
- Fri Feb 10, 2017 9:44 pm
- Forum: Calculating Work of Expansion
- Topic: Which process does more work?
- Replies: 5
- Views: 1734
Which process does more work?
From Chapter 8 Number 11: A piston confines 0.200 mol Ne(g) in 1.20 L at 25 degrees C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.20 L against a constant pressure of 1.00 atm (b) The gas is allowed to expand reversibly and isothermally to the same final v...
- Thu Feb 02, 2017 7:22 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
Re: Post All Chemistry Jokes Here
I have many chemistry jokes... I'm just afraid they won't get a good reaction.
- Thu Feb 02, 2017 7:20 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
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
He just couldn't put it down
- Sat Dec 03, 2016 2:07 pm
- Forum: Photoelectric Effect
- Topic: Units in Photoelectric Effect
- Replies: 1
- Views: 448
Re: Units in Photoelectric Effect
Typically the units should be in Joules/atom.
- Wed Nov 30, 2016 10:43 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Ka values in multiple reactions
- Replies: 1
- Views: 1867
Ka values in multiple reactions
Since polyprotic acids can donate more than one proton there is more than one reaction and more than one Ka value found. After finding each Ka of each reaction, why do you multiply the Kas together to get the overall K instead of adding them?
- Sat Nov 26, 2016 12:35 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Clarification of pH versus pOH [ENDORSED]
- Replies: 1
- Views: 442
Re: Clarification of pH versus pOH [ENDORSED]
yes because pH+pOH=14
- Fri Nov 18, 2016 9:56 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
Re: Post All Chemistry Jokes Here
What do you do with a sick chemist?
You can't helium, you can't curium, so you might as well barium.
You can't helium, you can't curium, so you might as well barium.
- Mon Oct 31, 2016 6:17 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Homework Question on Pollarding Power of Cations
- Replies: 1
- Views: 522
Homework Question on Pollarding Power of Cations
Can someone please give the answer and explanation to the question below?
Arrange the cations Rb+, Be2+, Sr2+ in order of increasing polarizing power. Give an explanation of your arrangement.
Arrange the cations Rb+, Be2+, Sr2+ in order of increasing polarizing power. Give an explanation of your arrangement.
- Sun Oct 30, 2016 4:29 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Seesaw angles
- Replies: 1
- Views: 532
Re: Seesaw angles
Yes, the angles are slightly less than 90 and 180 degrees
- Tue Oct 18, 2016 1:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: Difference between Ionic bonds and Molecules Lewis Strructure [ENDORSED]
- Replies: 1
- Views: 591
Difference between Ionic bonds and Molecules Lewis Strructure [ENDORSED]
Why are Ionic bonds' Lewis structures look different from the normal molecules lewis structures? For example, in our course reader the lewis formula for potassium chloride on page 76. Usually the normal lewis structures do not have brackets, what do these brackets for the ionic bonds mean?
- Fri Oct 14, 2016 1:31 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Definition of Orbitals
- Replies: 1
- Views: 616
Definition of Orbitals
Are spdf referred to as subshells or orbitals? Do orbitals mean mℓ?
- Sun Oct 09, 2016 9:51 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3052887
Re: Post All Chemistry Jokes Here
I dont trust atoms, I heard they make up everything.
- Sun Oct 02, 2016 10:43 pm
- Forum: Student Social/Study Group
- Topic: CHEM JOKES
- Replies: 29
- Views: 6909
Re: CHEM JOKES
I make horrible science puns too but only periodically.