Search found 21 matches

by Joe Zaarour 2L
Sat Mar 12, 2016 7:23 pm
Forum: Second Order Reactions
Topic: non-whole number orders
Replies: 1
Views: 774

non-whole number orders

Do orders have to be in whole numbers or could they be decimals and/or negative?
by Joe Zaarour 2L
Thu Mar 10, 2016 11:48 pm
Forum: *Alcohols
Topic: More than one functional group
Replies: 3
Views: 562

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?
by Joe Zaarour 2L
Sun Mar 06, 2016 8:50 pm
Forum: *Alkynes
Topic: Both an alkyne and alkane
Replies: 1
Views: 769

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?
by Joe Zaarour 2L
Tue Mar 01, 2016 12:53 am
Forum: *Electrophilic Addition
Topic: Intermediates
Replies: 2
Views: 516

Intermediates

How many intermediates are there in an electrophilic addition reaction?
by Joe Zaarour 2L
Sun Feb 28, 2016 10:58 pm
Forum: *Electrophilic Addition
Topic: Effect of temperature
Replies: 1
Views: 363

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?
by Joe Zaarour 2L
Sun Feb 21, 2016 4:41 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Reaction Profiles
Replies: 1
Views: 365

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?
by Joe Zaarour 2L
Sun Feb 21, 2016 4:29 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Transition states in rxn mechanisms
Replies: 1
Views: 377

Transition states in rxn mechanisms

Are transition states included in reaction mechanisms or are they left out?
by Joe Zaarour 2L
Thu Feb 18, 2016 1:00 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Forward rate=Reverse rate
Replies: 2
Views: 758

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?
by Joe Zaarour 2L
Sun Feb 07, 2016 6:37 pm
Forum: Calculating Work of Expansion
Topic: Usage of PV=nRT
Replies: 2
Views: 550

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?
by Joe Zaarour 2L
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: 819

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?
by Joe Zaarour 2L
Sun Jan 31, 2016 12:33 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Defining Potential
Replies: 1
Views: 261

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?
by Joe Zaarour 2L
Sun Jan 24, 2016 8:39 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Workbook Quiz 1. #9
Replies: 1
Views: 314

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?
by Joe Zaarour 2L
Sun Jan 24, 2016 8:29 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal affecting heat
Replies: 1
Views: 255

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?
by Joe Zaarour 2L
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: 303

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?
by Joe Zaarour 2L
Mon Jan 11, 2016 5:35 pm
Forum: Phase Changes & Related Calculations
Topic: Q. 37.Units of enthalpy?
Replies: 1
Views: 336

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?
by Joe Zaarour 2L
Mon Jan 11, 2016 5:27 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Q.8.29 Bond vibrations
Replies: 1
Views: 295

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?
by Joe Zaarour 2L
Wed Jan 06, 2016 6:29 pm
Forum: Calculating Work of Expansion
Topic: Work and energy
Replies: 1
Views: 297

Work and energy

What is the relationship between work and energy in correlation to a system and its surroundings?
by Joe Zaarour 2L
Fri Nov 20, 2015 7:50 pm
Forum: Resonance Structures
Topic: Drawing Resonance Lewis Structures Video
Replies: 2
Views: 345

Drawing Resonance Lewis Structures Video

This video explains resonance through the example of the sulfate molecule, (SO4)^-2. Enjoy! :)
by Joe Zaarour 2L
Sat Oct 24, 2015 9:22 pm
Forum: Hybridization
Topic: s-character
Replies: 1
Views: 343

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?
by Joe Zaarour 2L
Sun Oct 18, 2015 5:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape of Xe molecules
Replies: 1
Views: 464

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)
by Joe Zaarour 2L
Sun Oct 11, 2015 6:32 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Question 1.57 - Different Series
Replies: 1
Views: 407

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...

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