Search found 16 matches
- Sat Mar 12, 2016 1:31 pm
- Forum: *Ethers
- Topic: Ether naming
- Replies: 2
- Views: 1084
Ether naming
Is the -oxy- always placed before the main carbon chain when naming if there is an ether in the molecule? I am confused on the ordering.
- Sun Mar 06, 2016 9:59 pm
- Forum: *Nucleophiles
- Topic: Double Bonds
- Replies: 3
- Views: 532
Double Bonds
Why is a double bond considered a nucleophile?
- Sat Feb 27, 2016 5:35 pm
- Forum: *Aldehydes
- Topic: Numbering aldehydes
- Replies: 1
- Views: 566
Numbering aldehydes
For aldehydes or just in general for functional groups that are at the end of carbon chains, if there is a another substituent connected in the chain, do you start from the functional group side of the molecule when numbering to name it? Or does the lowest number rule still apply?
- Sat Feb 20, 2016 10:33 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Temperature constant
- Replies: 1
- Views: 376
Temperature constant
Why is U=0 when temperature is constant?
- Sun Feb 14, 2016 2:40 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation
- Replies: 1
- Views: 245
Arrhenius Equation
Is the Arrhenius Equation only used when dealing with temperature? Is there any other use for it when dealing with rate laws?
- Fri Feb 05, 2016 8:56 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated Systems
- Replies: 1
- Views: 316
Isolated Systems
Why is the universe an isolated system, especially when it is constantly expanding?
- Mon Jan 25, 2016 4:21 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Enthalpy and Mass Question
- Replies: 1
- Views: 361
Enthalpy and Mass Question
What mass of propane must be burned to supply 2580 kJ of heat? The standard enthalpy of combustion of propane at 298 K is -2220 kL/mol.
- Sat Jan 23, 2016 6:43 pm
- Forum: Phase Changes & Related Calculations
- Topic: Thermochemistry vs. Thermodynamics
- Replies: 1
- Views: 1211
Thermochemistry vs. Thermodynamics
What's the difference between thermochemistry and thermodynamics? Is thermodynamics a subset of thermochemistry?
- Thu Jan 14, 2016 1:33 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Calculating Bond Enthalpies
- Replies: 1
- Views: 369
Calculating Bond Enthalpies
Can someone give me a brief summary/elaborate on the three ways to calculate bond enthalpies? I know there is Hess's Law, using bond energies, and also using enthalpy of formations for reactants and products, but if someone could define these a little more, that would be awesome! Thanks!
- Wed Jan 06, 2016 8:30 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Understanding Bond Enthalpies
- Replies: 3
- Views: 2412
Understanding Bond Enthalpies
When computing bond enthalpies, why is it that the equation is: bonds broken minus bonds formed? I am so used to seeing products minus reactants or final value minus initial value when we compute change so why is this bonds of reactants minus bonds of products?
- Thu Nov 26, 2015 3:55 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Video: Lewis Structures and Bond Angles
- Replies: 1
- Views: 280
Video: Lewis Structures and Bond Angles
I made a video showing the Lewis structures, VSEPR formulas, and bond angles of a few molecules. Hope everyone is having an awesome Thanksgiving! My first video cut off, so it continues with the second video. Enjoy!
- Mon Oct 26, 2015 10:16 pm
- Forum: Lewis Structures
- Topic: Quiz 2 Preparation, Fall 2013, #9
- Replies: 3
- Views: 267
Re: Quiz 2 Preparation, Fall 2013, #9
Thank you so much!
- Sun Oct 25, 2015 5:31 pm
- Forum: Lewis Structures
- Topic: Quiz 2 Preparation, Fall 2013, #9
- Replies: 3
- Views: 267
Quiz 2 Preparation, Fall 2013, #9
I am very confused on this problem.
Which of the following species has two unpaired electrons?
a)OF+
b)NO+
c)CO+
Also, how does c's Lewis structure work when there are 9 electrons? Is it a radical?
Which of the following species has two unpaired electrons?
a)OF+
b)NO+
c)CO+
Also, how does c's Lewis structure work when there are 9 electrons? Is it a radical?
- Sun Oct 25, 2015 3:34 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: Bond order
- Replies: 1
- Views: 212
Bond order
Is bond order going to be on quiz 2?
- Sun Oct 11, 2015 1:55 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Atomic Configurations
- Replies: 1
- Views: 352
Re: Atomic Configurations
Yes, this is correct!
- Thu Oct 08, 2015 4:56 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Aufbau Principle
- Replies: 1
- Views: 311
Re: Aufbau Principle
The Aufbau principal states that electrons will fill the lowest energy levels first before filling the higher ones. Therefore, they become the most stable. However, you have to remember that the 4s orbital will be filled before the 3d orbital because it has a lower energy level.