Search found 14 matches
- Sun Mar 12, 2017 9:40 pm
- Forum: *Cycloalkenes
- Topic: Multiple double or triple bonds
- Replies: 2
- Views: 716
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.
- Sun Mar 12, 2017 9:11 pm
- Forum: General Science Questions
- Topic: Why do 8 electrons form a stable shell? [ENDORSED]
- Replies: 2
- Views: 656
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.
- Sun Mar 12, 2017 9:08 pm
- Forum: *Alcohols
- Topic: C and functional groups
- Replies: 2
- Views: 492
Re: C and functional groups
Yes they can, just as long as carbon does not go over four bonds.
- Sun Mar 05, 2017 5:02 pm
- Forum: *Nucleophiles
- Topic: movement of electrons
- Replies: 2
- Views: 712
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.
- 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: 954
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
- Sun Feb 26, 2017 10:15 pm
- Forum: First Order Reactions
- Topic: Equations for order reactions
- Replies: 1
- Views: 301
Re: Equations for order reactions
I think we should know how to derive these equations, because past finals have asked for the derivations.
- Sun Feb 19, 2017 7:27 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Multi Step Reaction
- Replies: 2
- Views: 433
Re: Multi Step Reaction
The step that affects the rate law is considered the slow step.
- Sun Feb 12, 2017 1:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Midterm WINTER 2013 Question
- Replies: 1
- Views: 381
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!
- Sun Feb 12, 2017 1:28 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: kJ or kJ/mol?
- Replies: 2
- Views: 350
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.
- Sun Feb 05, 2017 11:05 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: how to calculate n correctly
- Replies: 4
- Views: 659
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.
- Sun Jan 29, 2017 7:20 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free Energy vs. Internal Energy
- Replies: 1
- Views: 831
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.
- Sun Jan 22, 2017 2:11 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Entropy and Degeneracy
- Replies: 1
- Views: 251
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 ...
- Sun Jan 15, 2017 6:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Work of Expansion
- Replies: 1
- Views: 244
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...
- Sun Jan 15, 2017 6:29 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Clarification on Heat Capacities
- Replies: 2
- Views: 395
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...