Search found 59 matches

by Stevie Wisz
Sat Mar 12, 2016 8:33 pm
Forum: *Cycloalkanes
Topic: Need Help Naming
Replies: 2
Views: 370

Re: Need Help Naming

I got the same name you did but cyclopentane rather than cyclohexane.
by Stevie Wisz
Mon Mar 07, 2016 9:31 pm
Forum: *Carboxylic Acids
Topic: Functional groups vs. Substituents
Replies: 2
Views: 1602

Re: Functional groups vs. Substituents

So, basically, the difference is that functional groups may contain atoms other than C and H like N or O while substituents are only hydrocarbons?
by Stevie Wisz
Mon Mar 07, 2016 9:30 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Conformations General Question
Replies: 3
Views: 434

Re: Conformations General Question

But for our final exam, we should only focus on the conformations given to us as those of the specific molecules right? Like cyclohexane would be chair? Thanks!
by Stevie Wisz
Thu Mar 03, 2016 3:39 pm
Forum: *Alkenes
Topic: Naming
Replies: 3
Views: 503

Re: Naming

Only iso and neo are included in the alphabetizing so when you have tert and sec, you alphabetize in regards to the molecule. Tert-butyl would be before sec-pentyl. Hope this helps!
by Stevie Wisz
Tue Mar 01, 2016 10:57 am
Forum: *Alkanes
Topic: Naming Organic Compunds Help
Replies: 1
Views: 203

Naming Organic Compunds Help

by Stevie Wisz
Sun Feb 28, 2016 5:20 pm
Forum: *Alkanes
Topic: Quiz 3 Preparation
Replies: 34
Views: 11070

Re: Quiz 3 Preparation

So, on the quiz would both answers be correct?
by Stevie Wisz
Tue Feb 23, 2016 12:48 pm
Forum: *Enzyme Kinetics
Topic: Determining Catalysts
Replies: 3
Views: 408

Re: Determining Catalysts

Ronald's got it down! Catalysts appear on the reactant side as well as on the product side at some point in a reaction mechanism.
by Stevie Wisz
Tue Feb 23, 2016 12:46 pm
Forum: *Alkanes
Topic: Remembering the Prefixes for Organic Molecules
Replies: 2
Views: 482

Re: Remembering the Prefixes for Organic Molecules

This is so awesome! Thank you!
by Stevie Wisz
Thu Feb 18, 2016 2:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Going over the midterm
Replies: 2
Views: 363

Re: Going over the midterm

I would first talk to you TA about it because they are the one who grades it! Also, the sooner the better!
by Stevie Wisz
Tue Feb 16, 2016 10:09 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: PreEquilibrium Approach
Replies: 2
Views: 304

Re: PreEquilibrium Approach

Thank you!!!
by Stevie Wisz
Tue Feb 16, 2016 9:50 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: PreEquilibrium Approach
Replies: 2
Views: 304

PreEquilibrium Approach

Can someone explain to me the pre equilibrium approach. I am utterly confused and even after reading page 75 repeatedly, am still super confused. Thank sin advance!
by Stevie Wisz
Mon Feb 15, 2016 10:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2
Replies: 2
Views: 301

Re: Quiz 2

just kinetics.
by Stevie Wisz
Mon Feb 15, 2016 4:11 pm
Forum: General Rate Laws
Topic: Rate Law #7 (Quiz 2 Winter 2014)
Replies: 2
Views: 389

Re: Rate Law #7 (Quiz 2 Winter 2014)

The slow step determines the rate law!! So, because it has 2 NO's the rate law is Rate=k[NO]^2.
by Stevie Wisz
Mon Feb 15, 2016 3:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Grades/Review
Replies: 2
Views: 410

Re: Midterm Grades/Review

Laval said they would be given out after the lecture times on Wednesday!
by Stevie Wisz
Mon Feb 15, 2016 3:31 pm
Forum: Second Order Reactions
Topic: Quiz Prep 2 Winter 2015 #10
Replies: 2
Views: 422

Re: Quiz Prep 2 Winter 2015 #10

Thank you for the excellent response!^^
by Stevie Wisz
Wed Feb 10, 2016 11:21 am
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Determining Increasing Standard Molar Entropy
Replies: 2
Views: 3876

Re: Determining Increasing Standard Molar Entropy

The more complex the molecule is, the higher the molar entropy. SO, since CF4 is the molecule with largest size and most complex (more particles such as protons, electrons, etc) it has the highest entropy of the molecules given. I hope this helps!
by Stevie Wisz
Tue Feb 09, 2016 2:07 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Kj/mol or just kj?
Replies: 1
Views: 705

Kj/mol or just kj?

I was wondering, when calculating say enthalpy, when you express it in just kj and when you express it in kj/mol. On my quiz i was marked down for expressing it in units of kj but i am confused as to when i use just kj and when i use kj/mol.
by Stevie Wisz
Mon Feb 08, 2016 10:03 pm
Forum: Calculating Work of Expansion
Topic: Midterm 2012 Q5, Change in Volume
Replies: 3
Views: 364

Re: Midterm 2012 Q5, Change in Volume

For this same problem, why is the, for step 2, the internal energy equal to -50 J?
by Stevie Wisz
Wed Feb 03, 2016 8:18 pm
Forum: Balancing Redox Reactions
Topic: Cell Potential and Balancing Half Reactions
Replies: 1
Views: 174

Cell Potential and Balancing Half Reactions

On 14.11 Homework problem it asks to write the half redox reactions in a galvanic cell which I know how to do, although I had a question regarding cell potential... if Ecell of Ni2+ (aq) + 2e- ---> Ni (s) is -.23 V, and you need the reverse reaction Ni(s)----> Ni2+ + 2e- would this reactions cell po...
by Stevie Wisz
Tue Feb 02, 2016 3:58 pm
Forum: Balancing Redox Reactions
Topic: Identifying Oxidizing Agent and Reducing Agent
Replies: 3
Views: 364

Re: Identifying Oxidizing Agent and Reducing Agent

Oddly, it is backwards, so just remember that the species reduced is the oxidizing agent and the species oxidized is the reducing agent.
by Stevie Wisz
Tue Feb 02, 2016 3:55 pm
Forum: Balancing Redox Reactions
Topic: Helpful Tip
Replies: 2
Views: 291

Re: Helpful Tip

This is super clever! Thank you!
by Stevie Wisz
Tue Feb 02, 2016 3:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 1 Score
Replies: 2
Views: 619

Re: Quiz 1 Score

Most TA's are handing them back this week in discussion!
by Stevie Wisz
Thu Jan 28, 2016 2:18 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Reversible?
Replies: 3
Views: 445

Re: Reversible?

In almost all cases they will indicate whether the process is reversible or irreversible. But, if not, know that reversible have infinitely small volume changes where as irreversible have fairly larger volume changes. Reversible have potential to shift back to their equilibrium conditions whereas ir...
by Stevie Wisz
Tue Jan 26, 2016 6:57 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: When to use the unit kJ/mol
Replies: 2
Views: 372

Re: When to use the unit kJ/mol

Commenting on this because I had the same question!
by Stevie Wisz
Mon Jan 25, 2016 10:13 am
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Question 9.30
Replies: 1
Views: 506

Re: Question 9.30

That or the amounts of particles each contains (electrons, protons, etc), states of the molecules, or how complex each is.
by Stevie Wisz
Mon Jan 25, 2016 10:10 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Units of molar capacity
Replies: 3
Views: 262

Re: Units of molar capacity

A change in 1 kelvin is the same as a change in one degree celsius, correct? Thanks!
by Stevie Wisz
Thu Jan 21, 2016 10:45 am
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Increase in Disorder
Replies: 2
Views: 550

Re: Increase in Disorder

Yes! Entropy is a measurement of disorder of a system so if there is an increase in disorder there will be an increase in the entropy which results in a spontaneous reaction. If the entropy is negatively charged then the reaction is not spontaneous and there's a decrease in entropy, etc. Hope this h...
by Stevie Wisz
Tue Jan 19, 2016 11:28 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Entropy
Replies: 2
Views: 295

Re: Entropy

Extenisve properties are dependent on how much material/substance is present. So, entropy is an extensive property because it is dependent on how much substance is present.
by Stevie Wisz
Tue Jan 19, 2016 11:16 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Residual Entropy
Replies: 3
Views: 481

Re: Residual Entropy

So, when a compound has resonance, it typically has a higher entropy than a compound that does not have resonance?
by Stevie Wisz
Tue Jan 19, 2016 11:14 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: degeneracy
Replies: 3
Views: 551

Re: degeneracy

Is degeneracy related to residual entropy?
by Stevie Wisz
Thu Jan 14, 2016 10:47 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Problem 8.117
Replies: 1
Views: 237

Homework Problem 8.117

I was wondering why the change of moles of the reaction CH4 + H2O YIELDS CO2 + 3 H2 was +2/3 moles? (with the production of 1 mole H2) This might be a dumb question because my brain is so fried but i cannot figure out why the delta n is 2/3.? Sorry and thanks ahead of time. :D
by Stevie Wisz
Wed Jan 13, 2016 5:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.73 Bond Enthalpy of Benzene
Replies: 4
Views: 2109

Re: 8.73 Bond Enthalpy of Benzene

Regarding this problem, I just need clarification.... the more energy/enthalpy the more stable the molecule? For instance, the benzene structure that is higher in kj is the most stable, correct? :)
by Stevie Wisz
Mon Jan 11, 2016 8:51 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Problem 8.51
Replies: 2
Views: 360

Homework Problem 8.51

In this question it has the reaction 4 C7H5N3O6 + 21 O2 yields 28 CO2 + 10 H2O + 6 N2 When calculating the enthalpy for the entire reaction you do the sum of the enthalpies of the products minus that of the reactants. Although in the solutions manual, when calculating that, the enthalpy of the N2 wa...
by Stevie Wisz
Mon Jan 11, 2016 8:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Problem 8.51
Replies: 2
Views: 320

Homework Problem 8.51

In this question it has the reaction 4 C7H5N3O6 + 21 O2 yields 28 CO2 + 10 H2O + 6 N2 When calculating the enthalpy for the entire reaction you do the sum of the enthalpies of the products minus that of the reactants. Although in the solutions manual, when calculating that, the enthalpy of the N2 wa...
by Stevie Wisz
Thu Jan 07, 2016 9:25 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpies of bonds
Replies: 3
Views: 356

Re: Enthalpies of bonds

Thank you!! I think I was confusing enthalpy with entropy!!!! After reading chapter 9 I realized that my idea of enthalpy was mixed up with that of entropy. Thanks, again! :)
by Stevie Wisz
Wed Jan 06, 2016 1:44 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpies of bonds
Replies: 3
Views: 356

Enthalpies of bonds

After reading chapter 8 and attending lecture, I struggled with understanding how the breakage of a bond is endothermic? The way my mind works (lol) is that when a bond breaks it would release energy and thus be exothermic and have a negative charged enthalpy. Same goes with the bond formation; I as...
by Stevie Wisz
Wed Dec 02, 2015 11:31 pm
Forum: Calculating the pH of Salt Solutions
Topic: Determining pH of acids/bases
Replies: 1
Views: 292

Determining pH of acids/bases

Can someone explain to me why KBr has a neutral ph? Problem 71 from the 5th edition textbooks asks you to determine if the pH of specific molecules is less than, equal to, or greater than 7 and i had a difficult time determining the pH of KBr. Thanks!
by Stevie Wisz
Mon Nov 23, 2015 10:35 am
Forum: Empirical & Molecular Formulas
Topic: Video: Midterm Question 2: Empirical & Molecular Formulas
Replies: 1
Views: 398

Video: Midterm Question 2: Empirical & Molecular Formulas

Video for 2015 Midterm Question 2: Empirical and Molecular Formula

by Stevie Wisz and Naiomi Desai
by Stevie Wisz
Tue Nov 17, 2015 10:49 pm
Forum: Naming
Topic: Naming Coordinate Compounds
Replies: 2
Views: 347

Re: Naming Coordinate Compounds

Alphabetize using the first letters of the ligands. Act as if there are no prefixes. Or in other words, ignore the prefixes and strictly pay attention to the first letters of the atoms not prefixes!
by Stevie Wisz
Mon Nov 16, 2015 9:57 am
Forum: Naming
Topic: WorkBook Preparation for Quiz 3
Replies: 1
Views: 234

WorkBook Preparation for Quiz 3

I was wondering why, for number 3 on the second preparation Quiz for Quiz 3 in the workbook, why the chloride ion is listed before the ligand cyanide when naming the compound. I thought the ligand names go before the anions/metals? When i did the problem before checking my answer i had cyanochlorobi...
by Stevie Wisz
Thu Nov 12, 2015 6:20 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Polydentate and Oxidation Numbers
Replies: 4
Views: 681

Re: Polydentate and Oxidation Numbers

i am commenting because i am stuck on this problem too.
by Stevie Wisz
Thu Nov 12, 2015 6:03 pm
Forum: Naming
Topic: Writing Formulas when given name of compound
Replies: 1
Views: 223

Writing Formulas when given name of compound

I was doing problem 17.31 from the textbook and was struggling with determining how to write the formulas without knowing if the compound inside the brackets has its own charge. For instance, pentaaminesulfatocoblalt (III) bromide: what is the correct formula? the inside's charge, when i calculated ...
by Stevie Wisz
Sat Nov 07, 2015 10:36 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Calculating Equilibrium Concentrations
Replies: 2
Views: 271

Calculating Equilibrium Concentrations

When Prof. Lavelle was going over how to calculate the concentrations of products/reactants using ICE Box method I was confused as to how you (for the change in concentration) get -X or +2X, etc. Can someone explain this a little more in depth please? I realize you look at the molar ratio but I just...
by Stevie Wisz
Sat Nov 07, 2015 10:29 am
Forum: Administrative Questions and Class Announcements
Topic: Weekly Question
Replies: 5
Views: 1012

Re: Weekly Question

Does it HAVE to be a question or can it be replying to other's questions? For some reason theres no where for me to post on my screen or i just don't know how to do it I guess so I just comment to others for points. Does that count?
by Stevie Wisz
Sat Nov 07, 2015 10:25 am
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order and Bond Length
Replies: 2
Views: 531

Re: Bond Order and Bond Length

Bond order represents the number of bonds between two atoms/elements. So, because bond length decreases with multiplicity of bonds between two elements and increases with lesser amounts of bonds, the larger the Bond Order, the stronger the bond, the shorter the bond length and vice versa. Hope this ...
by Stevie Wisz
Sat Nov 07, 2015 10:09 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: CIS/TRANS - NEVER FORGET IT AGAIN!!!
Replies: 2
Views: 327

Re: CIS/TRANS - NEVER FORGET IT AGAIN!!!

This is awesome!! Thanks for the laugh, I really needed it after my long week!!!
by Stevie Wisz
Sat Nov 07, 2015 10:08 am
Forum: Dipole Moments
Topic: Polarity of XeF2
Replies: 4
Views: 5353

Re: Polarity of XeF2

I have a similar question regarding the polarity of PCl5... when working on this problem on the midterm last week I initially put that it was a non polar molecule do it its dimple moments canceling out and then i changed it to polar because I thought the molecule's dipole moments do not completely c...
by Stevie Wisz
Tue Nov 03, 2015 12:01 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty in position
Replies: 5
Views: 661

Re: Uncertainty in position

Regarding a problem similar like this: if you're given an electron confined to a radius 150 pm and another confined to a radius of greater than 150 pm and you calculate the uncertainty in velocity, how would you determine in which atoms can the velocity of the electron be known with the highest prec...
by Stevie Wisz
Mon Oct 26, 2015 5:33 pm
Forum: Lewis Structures
Topic: Lone Pairs
Replies: 1
Views: 202

Re: Lone Pairs

Lone pairs are pairs of electrons that are not bonded to any other elements. So, if the central atom contains a set of two electrons (pair) that are not bonded to any other element they are classified as a lone pair. With that said, if there is an elements that has multiple pairs of these lone pairs...
by Stevie Wisz
Mon Oct 26, 2015 5:29 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: formal charge
Replies: 3
Views: 389

Re: formal charge

so, say when comparing two resonance stuctures and everything is similar except one of the structures has a formal charge of -1 while the other has that of +1... what would be the more stable? the stucture with the positive 1? Thanks!
by Stevie Wisz
Tue Oct 13, 2015 9:18 pm
Forum: *Shrodinger Equation
Topic: Chapter 1: Problem 33: Schrodinger Equation
Replies: 2
Views: 424

Re: Chapter 1: Problem 33: Schrodinger Equation

i think i was having difficulty because my book is a different version......
by Stevie Wisz
Thu Oct 08, 2015 6:53 pm
Forum: Properties of Electrons
Topic: Homework Problems 1.33 and 1.37
Replies: 1
Views: 365

Homework Problems 1.33 and 1.37

I am working on completing all of the assigned homework problems and have come across some such as numbers 33 and 37 who have been very difficult for me. This is because Lavelle has not gone over these types of calculations. Will we be required to know how to calculate these types of problem on our ...
by Stevie Wisz
Thu Oct 08, 2015 6:52 pm
Forum: *Particle in a Box
Topic: Problems: Particle in a box & Probability of Finding E-'s
Replies: 3
Views: 997

Problems: Particle in a box & Probability of Finding E-'s

I am working on completing all of the assigned homework problems and have come across some such as numbers 33 and 37 who have been very difficult for me. This is because Lavelle has not gone over these types of calculations. Will we be required to know how to calculate these types of problem on our ...
by Stevie Wisz
Wed Oct 07, 2015 3:36 pm
Forum: *Shrodinger Equation
Topic: Chapter 1: Problem 33: Schrodinger Equation
Replies: 2
Views: 424

Chapter 1: Problem 33: Schrodinger Equation

I recall Prof. Lavelle saying that we will not need to utilize the Schrodinger equation to calculate any values but will need to know just the basis and concept of it. Although, there was a problem assigned by Lavelle (#33) that required the use of the equation to calculate a specific value. I was v...
by Stevie Wisz
Wed Oct 07, 2015 3:33 pm
Forum: *Shrodinger Equation
Topic: What exactly do we need to know about Schrodinger equation?
Replies: 4
Views: 459

Re: What exactly do we need to know about Schrodinger equati

I recall Prof. Lavelle saying that we will not need to utilize this equation to calculate any values but will need to know just the basis and concept of it. Although, there was a problem assigned by Lavelle that required the use of the equation to calculate a specific value. I was very confused by i...

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