Search found 12 matches

by Clara_Nguyen_1D
Fri Mar 17, 2017 5:09 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Chair vs. Boat
Replies: 2
Views: 355

Chair vs. Boat

How does a chair conformation turn into a boat conformation and vice versa? Which is more stable?
by Clara_Nguyen_1D
Mon Mar 13, 2017 11:50 pm
Forum: *Chem3D
Topic: Dynamic Molecules
Replies: 1
Views: 543

Dynamic Molecules

If something is dynamic, what does that tell us about the molecule other than the fact that it moves?
by Clara_Nguyen_1D
Mon Mar 13, 2017 11:48 pm
Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Topic: Conformation Determining
Replies: 2
Views: 789

Conformation Determining

How can we tell based on a formula if an alkane is staggered or eclipsed?
by Clara_Nguyen_1D
Sun Mar 05, 2017 10:17 pm
Forum: *Cycloalkanes
Topic: Common Naming (Vinyl/Allyl)
Replies: 1
Views: 238

Common Naming (Vinyl/Allyl)

Does the order of the double bond matter in an allyl structure? For example, do you need to number where the bromide is in relation to the double bond?
by Clara_Nguyen_1D
Sun Feb 26, 2017 2:57 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation Energy
Replies: 3
Views: 526

Activation Energy

How can we tell based on activation energy if a reaction is endothermic or exothermic?
by Clara_Nguyen_1D
Mon Feb 20, 2017 2:27 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Unique Reaction Rate
Replies: 1
Views: 310

Unique Reaction Rate

What is the difference between a normal reaction rate and a unique reaction rate?
by Clara_Nguyen_1D
Wed Feb 15, 2017 12:42 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation with ln vs. log
Replies: 2
Views: 1731

Nernst Equation with ln vs. log

The value, 0.0592 shows up when we use log and even though that is in the course reader, it is not on the equation sheet. Do we just memorize this value or is it possible to derive it?
Additionally, when do we give the variable n, the moles of electrons transferred vs. how many moles we are given?
by Clara_Nguyen_1D
Wed Feb 08, 2017 3:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagrams
Replies: 3
Views: 395

Cell Diagrams

When drawing cell diagrams, what is the difference between using a straight line versus a comma? In the case of questions in which reduction and oxidation occur with the same element, which one goes on the reduction/oxidation cathode/anode side?
by Clara_Nguyen_1D
Mon Feb 06, 2017 12:53 am
Forum: Balancing Redox Reactions
Topic: Ch. 14 #5
Replies: 1
Views: 271

Ch. 14 #5

In the question's solution, O3 gains two electrons to become O2, but I don't quite understand how that works. Is there a change in Lewis dot structure that causes that?
by Clara_Nguyen_1D
Wed Jan 25, 2017 10:59 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Practice Quiz #9
Replies: 1
Views: 268

Practice Quiz #9

On #9, we are asked to find which values are equal to 0, but other than q and w which will equal the internal energy of 0 for an isothermal reaction, I am not sure how to figure out the others. Are there other equations we need to be looking at? How do we figure out the degeneracy in this problem?
by Clara_Nguyen_1D
Wed Jan 18, 2017 11:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Ch.8 #51
Replies: 1
Views: 229

Ch.8 #51

For the question 8.51, I understand that you need to use Hess's Law to find the enthalpy of the reaction, but why when we are asked to find the enthalpy density is the answer positive and not negative? How do we know when to make the answer positive or negative?
by Clara_Nguyen_1D
Wed Jan 11, 2017 7:40 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calculating the Heat Given Off By a Reaction
Replies: 2
Views: 307

Calculating the Heat Given Off By a Reaction

On the example on page 20, I used the equation q=n*Cp*deltaT but the n represents moles not grams. In the example, the problem is in grams. Am I using the wrong equation or are we supposed to use grams not moles?

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