Search found 13 matches

by Noor_Burney_1L
Thu Mar 16, 2017 10:19 pm
Forum: *Cycloalkenes
Topic: Naming cyclopentdiene
Replies: 2
Views: 546

Re: Naming cyclopentdiene

Okay thank you! Would it still be considered correct if I included the numbering and named it as 1,3-cyclopentdiene instead of cyclopentdiene, even though there is only one structure?
by Noor_Burney_1L
Thu Mar 16, 2017 6:55 pm
Forum: *Cycloalkenes
Topic: Naming cyclopentdiene
Replies: 2
Views: 546

Naming cyclopentdiene

On page 29 of the Introduction to Organic Chemistry textbook it says that for Cyclopentdiene, because there is only one possible structure, numbering is not required. How is there only one possible structure? The two possible names I had gotten were 1,3-cyclopentdiene and 1,4-cyclopentdiene. So, how...
by Noor_Burney_1L
Sun Mar 12, 2017 9:22 pm
Forum: *Electrophiles
Topic: Self-test 4.2A
Replies: 1
Views: 470

Self-test 4.2A

On page 149 of the introduction to organic chemistry book, self-test 4.2A asks to draw the lewis structure for the aryl carbocation, 3,5-dimethylbenzene-1-ylium. I understand that it should be a ring structure, but I am confused on how to draw the other parts of the lewis structure based off of the ...
by Noor_Burney_1L
Sun Mar 05, 2017 11:01 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Reaction Cone
Replies: 1
Views: 232

Reaction Cone

On the day we were going over page 74 of the course reader in lecture, Professor Lavelle mentioned a reaction cone, with regards to second order, when going over the example below: 2BrNO (g) ----> [ON--Br-----Br--NO]‡ ----> 2NO (g) + Br2 (g) What exactly is a reaction cone, and how is it related to ...
by Noor_Burney_1L
Sun Feb 26, 2017 11:02 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: k, temperature, and activation energy
Replies: 2
Views: 305

k, temperature, and activation energy

Why is it that at a higher temperature, there are more molecules that have a greater energy, E, than activation energy, Ea?
by Noor_Burney_1L
Sun Feb 19, 2017 2:20 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: QUIZ 2 #11
Replies: 3
Views: 350

Re: QUIZ 2 #11

First, I defined k1, the rate constant, for 25 /min at 298K and k2, the other given rate constant, for 35 /min at 350 K. I then defined k3 as the rate constant value I am looking for. After using the Arrhenius equation to find the activation energy, which is 5611 J/mol, you can then plug in the valu...
by Noor_Burney_1L
Sun Feb 12, 2017 9:37 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: How do you know which is the anode and which is the cathode?
Replies: 3
Views: 352

Re: How do you know which is the anode and which is the cathode?

When you look up the standard reduction potential values, you identify which Enot value is the most positive, and which Enot value is the most negative. The most positive Enot value tells you which is being reduced, and the the most negative Enot value tells you which is being oxidized. So for quest...
by Noor_Burney_1L
Sun Feb 05, 2017 9:05 pm
Forum: Balancing Redox Reactions
Topic: Cell potential in class example
Replies: 1
Views: 209

Re: Cell potential in class example

You wouldn't multiply E0 of iron by 2 because E0 is an intensive property, which means that the E0 value itself does not change.
by Noor_Burney_1L
Sat Jan 28, 2017 11:58 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Quiz 1 Preparation, Question #11
Replies: 1
Views: 246

Quiz 1 Preparation, Question #11

On question #11 of the quiz 1 preparation (pg. 116 in course reader), it asks: "How many grams of water can be heated from 25.0 degrees Celsius to 100.0 degrees Celsius by the heat released from converting 49.7 g of PbO to Pb?" The converting reaction is PbO (s) + C (s) --> Pb (s) + CO (g)...
by Noor_Burney_1L
Sun Jan 22, 2017 12:24 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Quiz 1 Preparation, Question #4
Replies: 1
Views: 371

Quiz 1 Preparation, Question #4

On Quiz 1 Preparation question #4 (page 113) in the course reader, it asks to calculate the standard enthalpy of vaporization of liquid bromine when given the standard enthalpy of sublimation as well as the standard enthalpy of fusion. In order to solve this, would you use the equation: Standard ent...
by Noor_Burney_1L
Sat Jan 21, 2017 11:20 pm
Forum: Phase Changes & Related Calculations
Topic: Quiz Prep #1 question #8
Replies: 2
Views: 421

Re: Quiz Prep #1 question #8

Yes, I also got that there is no temperature at which the reaction will be spontaneous.
by Noor_Burney_1L
Sat Jan 14, 2017 11:13 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: A System at Constant Volume
Replies: 3
Views: 426

A System at Constant Volume

Is a system at constant volume an open, closed, or isolated system?
by Noor_Burney_1L
Sat Jan 14, 2017 5:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7569
Views: 1011371

Re: Post All Chemistry Jokes Here

All the good periodic table jokes argon?
I don't zinc so!

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