Search found 21 matches
- Sat Mar 12, 2016 7:23 pm
- Forum: Second Order Reactions
- Topic: non-whole number orders
- Replies: 1
- Views: 1043
non-whole number orders
Do orders have to be in whole numbers or could they be decimals and/or negative?
- Thu Mar 10, 2016 11:48 pm
- Forum: *Alcohols
- Topic: More than one functional group
- Replies: 3
- Views: 862
More than one functional group
On the final, would we get more than one functional group? If so, what is the process to name a molecule with more than one functional group?
- Sun Mar 06, 2016 8:50 pm
- Forum: *Alkynes
- Topic: Both an alkyne and alkane
- Replies: 1
- Views: 1350
Both an alkyne and alkane
How do you name a compound that has both a double bond and a single bond? Does one have priority over the other?
- Tue Mar 01, 2016 12:53 am
- Forum: *Electrophilic Addition
- Topic: Intermediates
- Replies: 2
- Views: 725
Intermediates
How many intermediates are there in an electrophilic addition reaction?
- Sun Feb 28, 2016 10:58 pm
- Forum: *Electrophilic Addition
- Topic: Effect of temperature
- Replies: 1
- Views: 544
Effect of temperature
Electrophilic addition is exergonic so the Ea of the reverse reaction is larger than that of the forward reaction. If the temperature increases, will K increase or decrease because doesn't the rate constant increase for the reaction with a larger Ea?
- Sun Feb 21, 2016 4:41 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Reaction Profiles
- Replies: 1
- Views: 491
Reaction Profiles
When asked to draw a reaction profile, do we make the y-axis the potential energy or standard gibbs free energy or are these two terms interchangeable?
- Sun Feb 21, 2016 4:29 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Transition states in rxn mechanisms
- Replies: 1
- Views: 522
Transition states in rxn mechanisms
Are transition states included in reaction mechanisms or are they left out?
- Thu Feb 18, 2016 1:00 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Forward rate=Reverse rate
- Replies: 2
- Views: 1372
Forward rate=Reverse rate
At equilibrium, why does the forward rate=the reverse rate. If K>1, shouldn't the forward rate be greater than the reverse rate because there are more products formed than reactants?
- Sun Feb 07, 2016 6:37 pm
- Forum: Calculating Work of Expansion
- Topic: Usage of PV=nRT
- Replies: 2
- Views: 777
Usage of PV=nRT
Work=-PdeltaV. Can we replace -PdeltaV with -nRT? Or can we only replace it with -nRT if the gas is ideal?
- Sun Feb 07, 2016 2:40 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Relation between delta G naught and delta G
- Replies: 1
- Views: 2825
Relation between delta G naught and delta G
Delta G naught is equal to zero when the equilibrium constant for the reaction is 1, and delta G is equal to zero when the system is at equilibrium. If delta G naught is equal to zero, does that mean delta G is also equal to zero also because the reaction is not favoring either direction?
- Sun Jan 31, 2016 12:33 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Defining Potential
- Replies: 1
- Views: 411
Defining Potential
What does the term potential mean? It keep hearing it during lecture to describe as a way to describe anodes and cathodes, but what is it?
- Sun Jan 24, 2016 8:39 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Workbook Quiz 1. #9
- Replies: 1
- Views: 421
Workbook Quiz 1. #9
I balanced the equation by putting a 1/2 coefficient in front of the oxygen yet I got the wrong Gibbs value. When I balance it by putting a 2 coefficient in front of HgO and a 2 in front of Hg, I get the right answer. Are we not allowed to balance the equation by putting fractions?
- Sun Jan 24, 2016 8:29 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Isothermal affecting heat
- Replies: 1
- Views: 364
Isothermal affecting heat
For isothermal reactions, deltaT=0 so deltaU=0 and w=-q. But, q=nCdeltaT so wouldn't q be equal to 0 as well?
- Mon Jan 11, 2016 5:41 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Q. 8.49 Assuming standard reactions
- Replies: 1
- Views: 423
Q. 8.49 Assuming standard reactions
For Q. 8.49, do we just assume the reaction is standard unless told otherwise or is there an indicator in the problem?
- Mon Jan 11, 2016 5:35 pm
- Forum: Phase Changes & Related Calculations
- Topic: Q. 37.Units of enthalpy?
- Replies: 1
- Views: 442
Q. 37.Units of enthalpy?
Question 37 asks what is the enthalpy of vaporization of methane and the answer is in kj/mol. Is enthalpy always expressed in kj/mol?
- Mon Jan 11, 2016 5:27 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Q.8.29 Bond vibrations
- Replies: 1
- Views: 407
Q.8.29 Bond vibrations
For question 8.29, the solutions manual states that "as more atoms are present in the molecule, there are more possible bond vibrations that can absorb added energy." What are bond vibrations and how do they relate to energy storage?
- Wed Jan 06, 2016 6:29 pm
- Forum: Calculating Work of Expansion
- Topic: Work and energy
- Replies: 1
- Views: 427
Work and energy
What is the relationship between work and energy in correlation to a system and its surroundings?
- Fri Nov 20, 2015 7:50 pm
- Forum: Resonance Structures
- Topic: Drawing Resonance Lewis Structures Video
- Replies: 2
- Views: 444
Drawing Resonance Lewis Structures Video
This video explains resonance through the example of the sulfate molecule, (SO4)^-2. Enjoy! :)
- Sat Oct 24, 2015 9:22 pm
- Forum: Hybridization
- Topic: s-character
- Replies: 1
- Views: 433
s-character
I have a question about problem 4.43. "Do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids increase?" What is an s-character?
- Sun Oct 18, 2015 5:13 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape of Xe molecules
- Replies: 1
- Views: 867
Shape of Xe molecules
In various molecules: XeOF*2, XeF*4, and XeOF*4, Xe is the central atom. Why is Xe the central atom even though it has the highest ionization energy? (I used * to represent the subscript of the previous atoms which in this case were all flourine)
- Sun Oct 11, 2015 6:32 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Question 1.57 - Different Series
- Replies: 1
- Views: 544
Re: Question 1.57 - Different Series
I believe the next wavelengths would be those in the Lyman series. If the electron returns to n=2 from any higher energy level, then the spectral line is in the Balmer series. The spectral line is visible. If an electron returns to n=3 for example, it would not be in the Balmer series. It would be a...