Search found 10 matches
- Mon Mar 07, 2016 10:26 am
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Torsional Strain
- Replies: 1
- Views: 319
Torsional Strain
What aspect of bonding determines torsional strain? What does torsional strain mean for a molecule's potential energy?
- Mon Mar 07, 2016 10:17 am
- Forum: Conjugate Acids & Bases
- Topic: Anion Stability
- Replies: 1
- Views: 477
Re: Anion Stability
Anion stability is necessarily affected by carbon string length. CH3COOH has better anion stability than C3H7COOH because CH3COOH is has more electronegative atoms next to the charge (the COOH being right next to the anion). More electronegative atoms next to the charge results in more stability.
- Mon Feb 29, 2016 11:29 am
- Forum: *Nucleophiles
- Topic: Alkyl and Aryl Carbanions
- Replies: 3
- Views: 654
Re: Alkyl and Aryl Carbanions
Aryl carbanions are aromatic compounds (part of carbons having sigma bonds and delocalized pi bonds forming a ring) and have a -1 charge whereas Alkyl carbanions are non aromatic compounds and have a +1 charge.
- Sun Feb 21, 2016 9:54 pm
- Forum: *Alkanes
- Topic: Double bond of an alkene
- Replies: 3
- Views: 517
Re: Double bond of an alkene
In this case, (An Alkane which is a hydrocarbon with a double bond, is involved) the double bond electrons always act as the nucleophiles because otherwise the alkane would be broken into two molecules. In other cases, single bonds can possibly act as nucleophiles if the decomposition of the molecul...
- Wed Feb 17, 2016 3:22 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: activation energy
- Replies: 3
- Views: 564
Re: activation energy
The A value or pre-exponential factor would be given to you in this case if you are trying to find the activation energy. It would also be the y-intercept in a graph of lnk vs 1/T.
- Mon Feb 08, 2016 12:00 am
- Forum: Balancing Redox Reactions
- Topic: Oxidation and Reduction
- Replies: 3
- Views: 525
Re: Oxidation and Reduction
Hello. In regards to the second part of your question, a positive E value denotes a reduction whereas a negative E value denotes oxidation.
- Sun Jan 31, 2016 6:12 pm
- Forum: Balancing Redox Reactions
- Topic: 2 Half Reactions
- Replies: 2
- Views: 421
Re: 2 Half Reactions
Reversing the half reaction with the larger E would result in the full reaction having a negative cell potential. If a reaction has a negative cell potential, it will not be spontaneous and therefore not occur naturally.
- Sun Jan 24, 2016 4:54 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Sign of Gibbs Free Energy
- Replies: 1
- Views: 301
Re: Sign of Gibbs Free Energy
The reaction is spontaneous at high temperatures when both enthalpy and entropy are positive because a high temperature will cause the positive entropy to dominate over the positive enthalpy. This results in a negative delta G, meaning that free energy was used to do work and thus the reaction has o...
- Sun Jan 17, 2016 7:49 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Changes in Volume
- Replies: 2
- Views: 436
Re: Changes in Volume
Yes, volume change is negligible when solids and liquids are involved in a reaction within a closed or isolated system. When a gas substance undergoes a physical change into either a solid or liquid, the change in volume is incredibly high compared to when a solid or liquid changes into a liquid or ...
- Fri Jan 08, 2016 7:53 am
- Forum: Phase Changes & Related Calculations
- Topic: Vaporization Heat Transfer
- Replies: 3
- Views: 701
Re: Vaporization Heat Transfer
Vaporization is an endothermic reaction as energy is being put into a system in order to convert a liquid substance to a into gas. Endothermic reaction always involve the input of energy to break chemical bonds