Search found 20 matches

by Sunny Chera 1N
Sun Mar 19, 2017 11:58 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sun Mar 19, 2017 11:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Tue Mar 14, 2017 11:20 pm
Forum: *Haloalkenes
Topic: Haloalkane/Haloalkene Naming question
Replies: 1
Views: 521

Haloalkane/Haloalkene Naming question

On the top right hand side on page 50 of the Introduction to Organic Chemistry textbook, the geometric isomer with the Cl and F being trans across the double bond, also has a triple bond. The book named it as (E)-3-Chloro-4-fluoro-7-methyloct-3-en-5-yne. However, why can it not be (E)-6-Chloro-5-flu...
by Sunny Chera 1N
Sat Mar 11, 2017 9:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sat Mar 04, 2017 6:01 pm
Forum: *Nucleophiles
Topic: Thiocyanate Lewis Structure [ENDORSED]
Replies: 3
Views: 1000

Re: Thiocyanate Lewis Structure [ENDORSED]

When constructing the lewis structure of Azide, N3-, I noticed that the solution put a positive charge on the central nitrogen atom and negative charges on the outer nitrogen atoms. I do not understand why the central nitrogen atom would have a positive charge on it? Since they are all nitrogen atom...
by Sunny Chera 1N
Sun Feb 26, 2017 10:25 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sun Feb 26, 2017 10:23 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sun Feb 19, 2017 11:47 pm
Forum: General Rate Laws
Topic: Pseudo-first-order reaction
Replies: 1
Views: 268

Re: Pseudo-first-order reaction

When rate laws depend on more than one species, we can simplify the analysis by keeping on the species at a "constant" concentration throughout the reaction. For example, using the textbook's example, iodide ions get oxidized by persulfate ions, represented by: Rate of consumption of I^-=k...
by Sunny Chera 1N
Sun Feb 19, 2017 11:32 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Order of reactants
Replies: 1
Views: 216

Re: Order of reactants

The textbook explicitly mentions that it will not go beyond second-order reactions. Assuming we are adhering closely to the book, I would say that we just need to know how to deal with first and second order reactions!
by Sunny Chera 1N
Sun Feb 19, 2017 11:29 pm
Forum: Second Order Reactions
Topic: Is there such a thing as a Third Order Reaction?
Replies: 5
Views: 806

Re: Is there such a thing as a Third Order Reaction?

Does anyone know if we need to know all the details about activation energy, collision theory, and transition state theory for quiz #2? References to these topics were made in class, so I am not sure if I should spend time reading that portion of the text for now. Also the preparatory quiz in the Co...
by Sunny Chera 1N
Sun Feb 12, 2017 11:12 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Moles in Galvanic Cell
Replies: 2
Views: 298

Re: Moles in Galvanic Cell

Yeah so you have to derive the two half-reactions from the skeletal equation, and from those two half-reactions, you can determine the number of moles of electrons you need to use for that equation. For example, if you have Zn(s) getting oxidized at the anode and Cu2+ ions getting reduced at the cat...
by Sunny Chera 1N
Sun Feb 12, 2017 11:00 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work
Replies: 1
Views: 270

Re: Work

When delta U=0, in the case of isothermal expansion, the internal energy lost as work is replaced by heat. If heat were to be zero (q=0), then this would not be isothermal expansion. If a piston does 1000 J of work, then 1000 J of energy is replaced in the form of heat.
by Sunny Chera 1N
Sun Feb 05, 2017 11:37 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

What do you call a tooth in a glass of water?

A one molar solution!

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by Sunny Chera 1N
Sun Jan 29, 2017 11:20 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sun Jan 29, 2017 6:07 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7606
Views: 1018395

Re: Post All Chemistry Jokes Here

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by Sunny Chera 1N
Sun Jan 22, 2017 4:30 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: 8.49
Replies: 3
Views: 516

Re: 8.49

For this problem, you must look at the balanced equation and determine the change in moles, delta(n)=nfinal-ninitial. In this case, nfinal would be 3 moles since there are 3 moles on the products side of the equation, and ninitial would be 2 moles, as there are two moles on the reactants side of the...
by Sunny Chera 1N
Sun Jan 22, 2017 4:21 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Chapter 8 HMWK Problem 8.21 Clarification
Replies: 1
Views: 252

Chapter 8 HMWK Problem 8.21 Clarification

The question is stated as follows: Question: A piece of copper of mass 20.0 g at 100.0 degrees Celsius is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 degrees Celsius. Calculate the final temperature of the water. Assume that no energy is lost to the surround...
by Sunny Chera 1N
Sun Jan 22, 2017 4:20 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Chapter 8 HMWK Problem 8.21 Clarification
Replies: 1
Views: 225

Chapter 8 HMWK Problem 8.21 Clarification

The question is stated as follows: Question: A piece of copper of mass 20.0 g at 100.0 degrees Celsius is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 degrees Celsius. Calculate the final temperature of the water. Assume that no energy is lost to the surround...
by Sunny Chera 1N
Sun Jan 15, 2017 12:11 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work due to compression
Replies: 1
Views: 198

Re: Work due to compression

Compression is the reverse of expansion. We know that work=-Pex(delta)V when the pressure is constant (see the book for derivation). If we were working with an expansion problem, work should come out negative, since work is being done by the system rather than on the system. Now consider the case of...
by Sunny Chera 1N
Sun Jan 15, 2017 12:01 pm
Forum: Student Social/Study Group
Topic: Chemistry Joke
Replies: 28
Views: 2900

Re: Chemistry Joke

I wish I was an ion so I could form an exothermic bond with you. Here is another funny one! A small piece of sodium which lived in a test tube fell in love with the Bunsen burner: "Oh Bunsen, my flame. I melt whenever I see you . . .", the sodium pined. "It's just a phase you're going...

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