Search found 10 matches

by Mindy Zhang 3F
Sun Mar 19, 2017 8:54 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011116

Re: Post All Chemistry Jokes Here

Q: Where does the German chemistry teacher put the used batteries of an electrolytic experiment?
A: In the zinc!
by Mindy Zhang 3F
Mon Mar 13, 2017 5:35 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011116

Re: Post All Chemistry Jokes Here

Q: What is the chemical formula for candy?
A: Carbon-Holmium-Cobalt-Lanthanum-Tellurium (CHoCoLaTe)!
by Mindy Zhang 3F
Sun Mar 05, 2017 9:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011116

Re: Post All Chemistry Jokes Here

Q. How do you tell the difference between a chemist and a train driver?
A. Ask them to pronounce “unionized”!
by Mindy Zhang 3F
Sun Feb 26, 2017 7:36 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011116

Re: Post All Chemistry Jokes Here

Two atoms are walking down the street and they run into each other:
“Are you alright?”
“No, I lost an electron!”
“Are you sure?”
“Yeah, I’m positive!”
by Mindy Zhang 3F
Sun Feb 19, 2017 9:19 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Intermediates in a reaction mechanism
Replies: 1
Views: 194

Re: Intermediates in a reaction mechanism

C. NO3 would be an intermediate since it doesn't appear in the reaction given by the problem. It is produced in step 1 and subsequently used in step 2.
by Mindy Zhang 3F
Sun Feb 12, 2017 2:08 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Winter 2016 Midterm Q1A
Replies: 2
Views: 390

Winter 2016 Midterm Q1A

I'm having some trouble understanding the diagram given. What exactly do the arrows on the diagram mean?
by Mindy Zhang 3F
Sun Feb 05, 2017 8:04 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Inert Conductors
Replies: 1
Views: 256

Re: Inert Conductors

We use inert conductors when both the reactant and product of a redox half reaction are in solution. Platinum is the most common inert conductor by far. Pt is included in the cell diagram, but is not included in the half reactions since Pt is inert, meaning it doesn't participate in the reaction.
by Mindy Zhang 3F
Sun Jan 29, 2017 8:32 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Derivation of Entropy Equation (changing temperature)
Replies: 1
Views: 213

Re: Derivation of Entropy Equation (changing temperature)

Hi, From my knowledge, you should be able to take the delta S = nR ln (V2/V1) and use the gas law that volume is directly proportional to the temperature in cases of constant pressure. (V2/V1)=(T2/T1) In this way, the formula delta S = nR ln (T2/T1) can be derived. Does anyone else have another expl...
by Mindy Zhang 3F
Sun Jan 22, 2017 7:00 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7567
Views: 1011116

Re: Post All Chemistry Jokes Here

What did the scientist say when he found 2 isotopes of helium?
HeHe!
by Mindy Zhang 3F
Sat Jan 14, 2017 12:15 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Symbols used on thermochemistry?
Replies: 1
Views: 307

Re: Symbols used on thermochemistry?

The degree superscript means that the enthalpy in question is a standard reaction enthalpy. H°f is the symbol for the standard enthalpy of formation.

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