Search found 52 matches

by Akash_Kapoor_1L
Mon Mar 19, 2018 12:46 am
Forum: Student Social/Study Group
Topic: Final
Replies: 11
Views: 862

Re: Final

In that case would there have been a couple different ways to set up that equation, cause I feel like what I did was right, but it was a different set up from what one of my friends did.
by Akash_Kapoor_1L
Sun Mar 18, 2018 2:43 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 11
Views: 862

Re: Final

What did people say for the True and False questions. Specifically the one of macrostates of molecules
by Akash_Kapoor_1L
Sun Mar 18, 2018 2:41 pm
Forum: Balancing Redox Reactions
Topic: Winter 2013 final Q4
Replies: 9
Views: 376

Re: Winter 2013 final Q4

How do you find these old finals?
by Akash_Kapoor_1L
Sun Mar 18, 2018 2:39 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff
Replies: 9
Views: 409

Re: Van't Hoff

I actually learned to calculate this and turned out it wasn’t on the final. But it’s good to know the concepts.
by Akash_Kapoor_1L
Sun Mar 18, 2018 2:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 200
Views: 45358

Re: Saying Thank You to Dr. Lavelle

Thank you Dr. Lavelle!!
by Akash_Kapoor_1L
Sun Mar 18, 2018 2:38 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 11
Views: 862

Re: Final

Not sure how I feel about that test
by Akash_Kapoor_1L
Sun Mar 18, 2018 10:44 am
Forum: First Order Reactions
Topic: k' in Pseudo-First-Order Rate Laws
Replies: 4
Views: 548

Re: k' in Pseudo-First-Order Rate Laws

How do we know when to use a pseudo-first-order method instead of calculating the second order rate law normally?
by Akash_Kapoor_1L
Sun Mar 18, 2018 10:39 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: >> [ENDORSED]
Replies: 2
Views: 269

Re: >> [ENDORSED]

I agree with Nora^^ It's usually used to define exponential inequalities
by Akash_Kapoor_1L
Sun Mar 18, 2018 10:37 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation Energy Temperature Dependence
Replies: 5
Views: 317

Re: Activation Energy Temperature Dependence

I'm pretty certain that the variable A is also defined as the frequency factor.
by Akash_Kapoor_1L
Sun Mar 18, 2018 10:30 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Putting an Ice cube into a glass of water
Replies: 4
Views: 655

Putting an Ice cube into a glass of water

Why don't we factor in the delta H of fusion into our calculation of the final temperature of water in these problems? Wouldn't some heat energy be lost in melting the ice cube or am I just overthinking the problem?
by Akash_Kapoor_1L
Fri Mar 16, 2018 8:28 pm
Forum: *Enzyme Kinetics
Topic: Kinetics and Enzymes
Replies: 7
Views: 339

Re: Kinetics and Enzymes

Would we need to know calculations related specifically to enzymes for the final or will we only need to know conceptual material?
by Akash_Kapoor_1L
Fri Mar 16, 2018 8:26 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Split of questions on the final
Replies: 3
Views: 287

Split of questions on the final

What is the split of questions on the final? Relatively how much of the final will be on older material (like Enthalpy and Entropy) and how much of the final will be on the newer material??
by Akash_Kapoor_1L
Wed Mar 14, 2018 3:48 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: hw #15.63
Replies: 1
Views: 76

Re: hw #15.63

You would start with the equation: ln(k 2 /k1 1 ) = E a /R * ((1/T 1 ) - (1/T 2 )) Where T 1 = 25 Degrees Celsius = 298 K Where T 2 = 37 Degrees Celsius = 310 K Where k 1 = 1.5 * 10^10 and you need to find k 2 So after computing this equation and making sure that you convert the value for R from J i...
by Akash_Kapoor_1L
Wed Mar 14, 2018 3:38 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: adiabatic process
Replies: 5
Views: 326

Re: adiabatic process

What kind of questions would we get asked on the final about adiabatic processes, would they all just be conceptual? Will the topic be on the final?
by Akash_Kapoor_1L
Wed Mar 14, 2018 3:33 pm
Forum: Environment, Ozone, CFCs
Topic: radical chain reaction
Replies: 2
Views: 1714

Re: radical chain reaction

The Syllabus told us to omit section 15.9 from our readings and there weren't any hw problems assigned on radical chain reactions. So to what extent do we need to know about radical chain reactions on the final? Would we just need to know the concept? Or is there anything else involved?
by Akash_Kapoor_1L
Wed Mar 14, 2018 3:30 pm
Forum: First Order Reactions
Topic: Determining Reaction Order
Replies: 5
Views: 253

Re: Determining Reaction Order

To determine reaction order you would add the coefficients of the concentrations in the Rate law. For example, if the rate law = k[A]^2 * [B]:
The Reaction is Second-Order in terms of A, First-Order in terms of B, and (2+1) Third-Order overall.
by Akash_Kapoor_1L
Thu Mar 08, 2018 10:24 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: Self-Test 15.4B
Replies: 1
Views: 173

Re: Self-Test 15.4B

If the value is not an integer then the units of k are proportional to the fraction. For example, if the reaction order is 3/2 then, the units of k would be L^1/2 * mol^(-1/2) * s^-1. The overall intention is to end up with the rate in (mol * L^-1 * s^-1), so you would modify the units of k to get t...
by Akash_Kapoor_1L
Tue Mar 06, 2018 7:03 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Integrated Rate Law
Replies: 2
Views: 148

Re: Integrated Rate Law

The specific integrate rate laws that we have found are integrated using the rate of loss of reactants. The short answer to your question is yes. However, there could be problems (similar to #23 (part c)) where you are given the concentration of the product and the molar ratio of products to reactan...
by Akash_Kapoor_1L
Tue Mar 06, 2018 4:24 pm
Forum: First Order Reactions
Topic: 15.23
Replies: 6
Views: 232

Re: 15.23

how do you get rid of the negative?? You get rid of the negative by flipping the natural log... Use the laws of logs and remember that ln[At]/[Ai] = ln[At] - ln[Ai], so if you bring the negative to the other side, you turn that into ln[Ai] - ln[At] = ln[Ai]/[At] This is why you get: t = 1/k * ln[Ai...
by Akash_Kapoor_1L
Tue Mar 06, 2018 4:17 pm
Forum: Second Order Reactions
Topic: Half-lives
Replies: 2
Views: 158

Re: Half-lives

Apart from what Remi said, the main reason you need to use the integrate rate laws instead of the logarithmic shortcut is because the rate of change in the concentrations of the reactants follows a curve which isn't depicted in the half-life formula. We find the half-life as ln2/k, but the only reas...
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:58 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Units of k
Replies: 8
Views: 244

Re: Units of k

What is the best way to convert between different units of k? Would we ever have to convert k from L/ mol*s, into 1/ kPa*s?
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:54 pm
Forum: Second Order Reactions
Topic: Limiting Step
Replies: 7
Views: 403

Re: Limiting Step

Do we have to know how to calculate the limiting step for test 3? Which hw problems focus on the limiting step?
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:49 pm
Forum: General Rate Laws
Topic: 3rd order, 4th order, etc.
Replies: 5
Views: 229

Re: 3rd order, 4th order, etc.

Could someone give some examples of a 3rd or 4th order reaction that we might see on a test? I've only seen 1st and 2nd order reactions in the textbook really.
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:46 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: K'
Replies: 7
Views: 227

Re: K'

Could someone explain what methods you would use to find k' in a pseudo reaction?
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:43 pm
Forum: General Rate Laws
Topic: Are there any textbook problems involving pseudo reactions?
Replies: 1
Views: 102

Re: Are there any textbook problems involving pseudo reactions?

I didn't find any in the textbook, but this website has some pretty good practice questions at the end.

https://chem.libretexts.org/Core/Physic ... _reactions
by Akash_Kapoor_1L
Mon Mar 05, 2018 4:36 pm
Forum: General Rate Laws
Topic: Test #3 Problems
Replies: 3
Views: 145

Re: Test #3 Problems

To what extent do we need to know/ be able to draw graphs for the different reaction orders?
by Akash_Kapoor_1L
Sun Jan 28, 2018 5:14 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Self-Test 9.2 B
Replies: 2
Views: 86

Re: Self-Test 9.2 B

This is a great question! I was lowkey confused about this too. The easiest way to know is based on the units that they give you and the units you want to end up with. You know that you want the entropy, which is in J/K... But the specific heat capacity value that they give you is in J/C*g. The only...
by Akash_Kapoor_1L
Thu Jan 25, 2018 2:37 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.65
Replies: 6
Views: 188

Re: 8.65

In the solutions manual, they say that "the reaction we want is" N2 + 5/2 O2 ----> N2O5
I'm not sure where they got the reaction from. Also is there a similar example to this in the textbook, because I'm not sure what method to use to solve this.
by Akash_Kapoor_1L
Tue Jan 09, 2018 11:45 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Book 8.11 [ENDORSED]
Replies: 5
Views: 224

Re: Book 8.11 [ENDORSED]

Is there a difference between enthalpy and molar enthalpy?? How would you covert one to the other?
by Akash_Kapoor_1L
Mon Dec 11, 2017 2:27 am
Forum: Bronsted Acids & Bases
Topic: Strong Acids and Bases [ENDORSED]
Replies: 3
Views: 506

Re: Strong Acids and Bases [ENDORSED]

So if you are just given the grams of a strong acid and the volume of the solution, how would you calculate the pH of the solution??
by Akash_Kapoor_1L
Mon Dec 11, 2017 2:24 am
Forum: Student Social/Study Group
Topic: final test back
Replies: 2
Views: 490

Re: final test back

I feel like they would just keep it for you until you are able to pick it up...
by Akash_Kapoor_1L
Mon Dec 11, 2017 2:23 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 824042

Re: Post All Chemistry Jokes Here

This thread is actual gold...
by Akash_Kapoor_1L
Sun Dec 03, 2017 4:41 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Trend in Acidity [ENDORSED]
Replies: 3
Views: 280

Re: Trend in Acidity [ENDORSED]

Will we be given pKa values? Or will we need to memorize/calculate them??
by Akash_Kapoor_1L
Sun Dec 03, 2017 4:39 pm
Forum: Lewis Acids & Bases
Topic: H+ as Lewis acid/base [ENDORSED]
Replies: 2
Views: 383

H+ as Lewis acid/base [ENDORSED]

When H+ is transferred in a reaction, is it concerted a bronsted or Lewis acid/base reaction? Is H+ always considered a Lewis acid?
by Akash_Kapoor_1L
Tue Nov 28, 2017 4:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.41
Replies: 2
Views: 152

Re: 11.41

I was confused about the same problem... Why do they give you the amount of ammonium carbamate and the temperature? Is there an alternate way of solving the problem that uses those two quantities??
by Akash_Kapoor_1L
Tue Nov 21, 2017 2:57 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Dipole Moments
Replies: 1
Views: 89

Dipole Moments

When drawing dipole moments are we supposed to use the original convention or the "modern convention" that is used in the textbook? The original convention points the arrow towards the more electronegative (negative charged) element, whereas the modern convention points the arrow towards t...
by Akash_Kapoor_1L
Sun Nov 19, 2017 6:44 pm
Forum: Hybridization
Topic: Electron density question
Replies: 4
Views: 207

Re: Electron density question

Yeah it does! Here's a helpful chart http://web.gccaz.edu/~chriy68124/VSEPR%20handout.pdf

Also, remember that you can use the AXE format to decipher the VSEPR geometric shape...
by Akash_Kapoor_1L
Mon Nov 13, 2017 12:25 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question 4.29 [ENDORSED]
Replies: 3
Views: 231

Re: Question 4.29 [ENDORSED]

What method do we use to name the isomers as 1-, 1-3, and 1-4?
by Akash_Kapoor_1L
Mon Nov 06, 2017 12:01 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation States: How to derive [ENDORSED]
Replies: 3
Views: 269

Oxidation States: How to derive [ENDORSED]

In question number 23, Chapter 3, the textbook asks us to find the maximum positive and negative oxidation numbers for Chlorine. I think I'm just confused on the general method for deriving the maximum oxidation numbers. How do we figure out what the maximum oxidation numbers would be??
by Akash_Kapoor_1L
Sun Nov 05, 2017 12:56 am
Forum: Ionic & Covalent Bonds
Topic: The use of hidden d orbital
Replies: 2
Views: 222

Re: The use of hidden d orbital

You would use up the d orbital of the highest energy level. For example in Sulfur, since you already have electrons in the 3s and 3p orbitals, you can also fill the 3d orbital with electrons... Recall how in the last chapter we looked at quantum numbers and if n=3, l = 0,1,2; thus any atom with n=3 ...
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:22 am
Forum: Octet Exceptions
Topic: F orbitals
Replies: 4
Views: 221

F orbitals

When do f orbitals come into play when considering chemical bonds and lewis structures? In the same way that atoms can fill up their d orbitals, can even larger atoms fill up their f orbitals too??
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:20 am
Forum: Formal Charge and Oxidation Numbers
Topic: How to figure out formal charge? [ENDORSED]
Replies: 6
Views: 750

Re: How to figure out formal charge? [ENDORSED]

Also make sure that you memorize the equation or know the concept behind calculating formal charge, because Dr. Lavelle said that he won't provide the equation on the reference sheet!!
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:17 am
Forum: Lewis Structures
Topic: Homework 3.71 [ENDORSED]
Replies: 3
Views: 183

Re: Homework 3.71 [ENDORSED]

Also, yes, the most dominant and stable resonance structure will be the one with the lowest energy, which means that it will have a formal charge closest to 0...
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:16 am
Forum: Lewis Structures
Topic: Homework 3.71 [ENDORSED]
Replies: 3
Views: 183

Re: Homework 3.71 [ENDORSED]

Remember to use the equation, Fc = V - (L + s/2), where V = the number of valence electrons, L = the number of lone electrons, s= the number of shared electrons to calculate the formal charge of each atom in the molecule!!
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:14 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Understadning Heisenberg Indeterminacy Equation
Replies: 6
Views: 327

Re: Understadning Heisenberg Indeterminacy Equation

Will the Heisenberg Indeterminacy Equation be given to us for Test 3 or should we know it for the test?
by Akash_Kapoor_1L
Tue Oct 31, 2017 11:08 am
Forum: Sigma & Pi Bonds
Topic: Pi Bonds
Replies: 4
Views: 552

Re: Pi Bonds

I had a similar question, which elements have the greatest tendencies to form Pi bonds and why do elements form Pi bonds instead of other alternatives?
by Akash_Kapoor_1L
Wed Oct 18, 2017 11:45 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Homework Problem 1.15
Replies: 4
Views: 244

Re: Homework Problem 1.15

Can we do this problem without using Rydberg's Formula? I'm trying to solve it with E= -hR/n^2, but I keep getting a decimal number... I'm not sure if I'm just doing the calculation wrong or if there is a problem with my method
by Akash_Kapoor_1L
Tue Oct 17, 2017 1:28 am
Forum: Photoelectric Effect
Topic: Difference Between Work Function and the Energy Required to Remove an Electron from one Atom [ENDORSED]
Replies: 4
Views: 299

Re: Difference Between Work Function and the Energy Required to Remove an Electron from one Atom [ENDORSED]

The only thing that you forgot was the stoichiometry, you need to convert the given data from kg/mol to J/atom ... Otherwise you are correct because the Work Function is defined as the Energy Required to Remove an Electron.
by Akash_Kapoor_1L
Tue Oct 17, 2017 1:23 am
Forum: Einstein Equation
Topic: Use of symbols
Replies: 6
Views: 601

Re: Use of symbols

If you are using slightly different symbols, you should make sure to define what each symbol is representing on the top of the blank space... As long as you do that, I don't see any reason for you to lose points. But also reach out to your TA, just in case
by Akash_Kapoor_1L
Mon Oct 09, 2017 1:48 pm
Forum: Properties of Light
Topic: Electromagnetic Spectrum
Replies: 1
Views: 132

Electromagnetic Spectrum

Should we memorize the specific wavelengths that correspond to certain colors and types of waves in the electromagnetic spectrum or will these be given to us on tests? (ex. 700 nm=red or 100 nm = ultraviolet)

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