Search found 14 matches

by Alexandra_Shambayate_2L
Sun Mar 12, 2017 9:40 pm
Forum: *Cycloalkenes
Topic: Multiple double or triple bonds
Replies: 2
Views: 510

Re: Multiple double or triple bonds

Hi Chelsey!! I don't think you have to put a prefix indicating the amount of double or triple bonds that are present in a cyclo-alkene/alkyne; the numbering in front of the name should be enough to indicate the position and amount of double or triple bonds involved in the molecule.
by Alexandra_Shambayate_2L
Sun Mar 12, 2017 9:11 pm
Forum: General Science Questions
Topic: Why do 8 electrons form a stable shell? [ENDORSED]
Replies: 2
Views: 481

Re: Why do 8 electrons form a stable shell? [ENDORSED]

Noble gases have eight electrons and they are considered the most stable elements, therefore it is most ideal and stable for other elements to have a shell of eight electrons to be at its most stable point.
by Alexandra_Shambayate_2L
Sun Mar 12, 2017 9:08 pm
Forum: *Alcohols
Topic: C and functional groups
Replies: 2
Views: 369

Re: C and functional groups

Yes they can, just as long as carbon does not go over four bonds.
by Alexandra_Shambayate_2L
Sun Mar 05, 2017 5:02 pm
Forum: *Nucleophiles
Topic: movement of electrons
Replies: 2
Views: 496

Re: movement of electrons

It depends on the mechanism, but it can come from either. Sometimes the electrons come from the atoms themselves, such as in the example of O- or Br- giving an e- to C+; other times it comes from the bonds, such as from a single, double or triple bond giving an e- to an atom.
by Alexandra_Shambayate_2L
Sun Mar 05, 2017 4:58 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: standard free energy of activation and Ea
Replies: 1
Views: 742

Re: standard free energy of activation and Ea

I believe it doesn't really matter. Both equations are calculating the same deltaG, it's just that the one that includes deltaH -TdeltaS is more accurate than the -RTlnK equation when finding deltaG, and Ea is found through the equation deltaH+RT
by Alexandra_Shambayate_2L
Sun Feb 26, 2017 10:15 pm
Forum: First Order Reactions
Topic: Equations for order reactions
Replies: 1
Views: 238

Re: Equations for order reactions

I think we should know how to derive these equations, because past finals have asked for the derivations.
by Alexandra_Shambayate_2L
Sun Feb 19, 2017 7:27 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Multi Step Reaction
Replies: 2
Views: 294

Re: Multi Step Reaction

The step that affects the rate law is considered the slow step.
by Alexandra_Shambayate_2L
Sun Feb 12, 2017 1:31 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Midterm WINTER 2013 Question
Replies: 1
Views: 312

Re: Midterm WINTER 2013 Question

Because you ice must melt into liquid, it must undergo a phase change. The (n)(deltaH fusion) is the heat (q) required to go from an ice state to a liquid state. Once the ice is melted and is a liquid, them you can solve for m C deltaT. Hope this helps!
by Alexandra_Shambayate_2L
Sun Feb 12, 2017 1:28 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: kJ or kJ/mol?
Replies: 2
Views: 234

Re: kJ or kJ/mol?

We are always supposed to include the units KJ/mol regarding delta G. The book made mistakes and only included KJ in some of their answers to the practice problems about Gibbs, but they are supposed to be KJ/mol.
by Alexandra_Shambayate_2L
Sun Feb 05, 2017 11:05 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: how to calculate n correctly
Replies: 4
Views: 417

Re: how to calculate n correctly

The number of electrons that you account for are the equal number of electrons transferring within each of the oxidation and reduction half reaction equations.
by Alexandra_Shambayate_2L
Sun Jan 29, 2017 7:20 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy vs. Internal Energy
Replies: 1
Views: 430

Re: Gibbs Free Energy vs. Internal Energy

Internal energy is the energy within a system at any time, while Gibbs free energy is energy that is available to be given off to do work.I hope this helps somehow.
by Alexandra_Shambayate_2L
Sun Jan 22, 2017 2:11 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Entropy and Degeneracy
Replies: 1
Views: 165

Re: Entropy and Degeneracy

HI! I think it has to do with the randomness of a system. Entropy is defined as the measure of disorder in a system. Degeneracy is defined as the number of possible states something can be in to achieve a certain energy. In this sense, the higher the degeneracy, the higher the entropy. If something ...
by Alexandra_Shambayate_2L
Sun Jan 15, 2017 6:31 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Work of Expansion
Replies: 1
Views: 181

Re: Work of Expansion

At a molar heat capacity of a gas at constant pressure, volume changes in order to maintain a certain pressure, and by doing so the the system does work when it expands or contracts with each adjustment. At a molar heat capacity of a gas at a constant volume, pressure changes, however, no work is do...
by Alexandra_Shambayate_2L
Sun Jan 15, 2017 6:29 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Clarification on Heat Capacities
Replies: 2
Views: 282

Re: Clarification on Heat Capacities

Specific heat capacity is the heat required to raise the temperature of 1 gram by 1 degree C, while molar heat capacity is the heat required to raise the temperature of 1 mole by 1 degree C. To figure out when to use which, I think you would just have to see if the question is being asked in grams o...

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