Search found 59 matches

by Swetha Sundaram 1E
Mon Mar 12, 2018 2:53 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.61
Replies: 4
Views: 138

Re: 15.61

k would be the rate constant of the forward reaction. k' would be the rate constant of the reverse reaction.
by Swetha Sundaram 1E
Mon Mar 12, 2018 2:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

No, a catalyst isn't a record of the cows you own
by Swetha Sundaram 1E
Mon Mar 12, 2018 2:48 pm
Forum: *Enzyme Kinetics
Topic: Adsorption
Replies: 11
Views: 236

Re: Adsorption

At least from what I understand about it, I think one would just act as a cover whereas the other one would become part of the catalyst?? I'm not sure about this though.
by Swetha Sundaram 1E
Thu Mar 08, 2018 7:17 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Intermediate [ENDORSED]
Replies: 7
Views: 165

Re: Intermediate [ENDORSED]

Right so when you compare them in separate reactions, we essentially cancel them out which is why they are not shown in the final reaction equation.
by Swetha Sundaram 1E
Thu Mar 08, 2018 7:12 pm
Forum: General Rate Laws
Topic: Integrated Rate Laws
Replies: 6
Views: 161

Re: Integrated Rate Laws

I thought that derivations were fair game.
by Swetha Sundaram 1E
Thu Mar 08, 2018 7:11 pm
Forum: General Rate Laws
Topic: 15.19
Replies: 2
Views: 105

Re: 15.19

I thought that we keep it to whatever units they give us. Unless they give us another piece of information that deals with another unit then we would convert it.
by Swetha Sundaram 1E
Fri Mar 02, 2018 2:53 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

Why did the liquid smell good?

Because it didn't past gas.
by Swetha Sundaram 1E
Fri Mar 02, 2018 2:52 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

Chemistry doesn't just matter, it is matter.
by Swetha Sundaram 1E
Tue Feb 27, 2018 11:19 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

The atom asks the electron, "why are you small?" The electron replies, "because I have a low charge!
by Swetha Sundaram 1E
Tue Feb 27, 2018 11:19 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

504754253 wrote:what kind of car do chemist drive? mercedes benzene


That was sodium funny...i slapped my neon that one
by Swetha Sundaram 1E
Tue Feb 27, 2018 11:16 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

The noble gases walk into a bar. No one reacts.
by Swetha Sundaram 1E
Tue Feb 27, 2018 11:16 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

504754253 wrote:how come every time i tell a joke there is no reaction?!


good one
by Swetha Sundaram 1E
Mon Feb 19, 2018 8:52 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram Order (14.11) [ENDORSED]
Replies: 4
Views: 167

Re: Cell Diagram Order (14.11) [ENDORSED]

I have a similar question and also on part c why is it written as ||Ce4+,Ce3+| because I thought it was supposed to be written as ||Ce4+|Ce3+
by Swetha Sundaram 1E
Mon Feb 19, 2018 8:49 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Test Equations Sheet
Replies: 2
Views: 79

Test Equations Sheet

For Test 2 will we be provided a similar page to that of Appendix 2b to help us determine what half-reactions and standard cell potential values we will have to use?
by Swetha Sundaram 1E
Mon Feb 19, 2018 8:47 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.15A
Replies: 4
Views: 124

Re: 14.15A

For this question, I was confused in how oxidation numbers were distributed in the original question because I thought Ag was +1 and Br was -1 and they stayed the same throughout because the ions split but this does not make sense in regards to reduction/oxidation half-reactions.
by Swetha Sundaram 1E
Wed Feb 14, 2018 1:36 pm
Forum: Calculating Work of Expansion
Topic: Calculating work for winter 2013 midterm 4.B.
Replies: 4
Views: 156

Re: Calculating work for winter 2013 midterm 4.B.

we can't use the regular w=-p*deltaV is the irreversible equation, also the pressure isn't constant from point b to c
by Swetha Sundaram 1E
Wed Feb 14, 2018 1:35 pm
Forum: Calculating Work of Expansion
Topic: Calculating work for winter 2013 midterm 4.B.
Replies: 4
Views: 156

Re: Calculating work for winter 2013 midterm 4.B.

Going from point B to point C, we are told that it is a reversible reaction so we use the equation that is w--nRTln(V2/V1)
by Swetha Sundaram 1E
Fri Feb 09, 2018 1:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

I try to tell chemistry jokes, but sometimes there's just no reaction.
by Swetha Sundaram 1E
Fri Feb 09, 2018 1:29 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

What did the Fe2+ say to the H+ that turned into H2?

"I'm sorry I reduced you! I swear it was an oxidant!"
by Swetha Sundaram 1E
Fri Feb 09, 2018 1:25 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Which molecule has higher Standard Molar Entropy
Replies: 1
Views: 159

Re: Which molecule has higher Standard Molar Entropy

Both benzene and 1-propanol both have 12 atoms compared to the 6 atoms for methanol. And benzene has a more rigid planar ring structure so 1-propanol has the highest standard molar entropy of all three.
by Swetha Sundaram 1E
Wed Jan 31, 2018 6:13 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 9.13
Replies: 5
Views: 153

Re: 9.13

Correct me if I'm wrong, but 3/2R represents a monatomic gas, 5/2R represents a diatomic gas, and 7/2R represents a polyatomic gas?
by Swetha Sundaram 1E
Wed Jan 31, 2018 6:11 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

Have you heard that entropy isn't what it used to be?
by Swetha Sundaram 1E
Wed Jan 31, 2018 6:09 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Homework 9.5 [ENDORSED]
Replies: 11
Views: 351

Re: Homework 9.5 [ENDORSED]

I'm pretty sure Sfinal -Sinitial works to solve most problems.
by Swetha Sundaram 1E
Thu Jan 25, 2018 2:08 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Molar Entropy vs Residual molar entropy
Replies: 2
Views: 96

Re: Molar Entropy vs Residual molar entropy

Molar entropy would be entropy content of one mole of substance under a standard state. Residual molar entropy is more specific in that it is the entropy at zero Kelvin.
by Swetha Sundaram 1E
Thu Jan 25, 2018 2:05 pm
Forum: Calculating Work of Expansion
Topic: Integrals [ENDORSED]
Replies: 3
Views: 151

Re: Integrals [ENDORSED]

As Vincent said above, I would agree in saying that integrals are used because they represent the value of the sum between two values.
by Swetha Sundaram 1E
Thu Jan 25, 2018 2:02 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: constant volume vs constant pressure
Replies: 3
Views: 126

Re: constant volume vs constant pressure

Yes I agree with Sammy. Also note that when they say mention constant pressure in the problem. The Specific Heat Capacity can be found by 5/2 multipled by R. And for constant volume the specific heat capacity can be found by 3/2 multiplied by R.
by Swetha Sundaram 1E
Tue Jan 16, 2018 11:08 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Delta H and q Interchangeability
Replies: 5
Views: 182

Re: Delta H and q Interchangeability

I think Delta H is only equal to q with a subscript "p" because the pressure has to remain constant for the equation to hold
by Swetha Sundaram 1E
Tue Jan 16, 2018 11:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: question 8.55
Replies: 1
Views: 60

Re: question 8.55

I think that it does count, but I would do one of the assigned problems just in case. If anything, it's extra practice :)
by Swetha Sundaram 1E
Tue Jan 16, 2018 11:02 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: homework question 8.57
Replies: 1
Views: 61

Re: homework question 8.57

The subscript c on the delta H represents that it's the standard enthalpy value for a combustion reaction.
by Swetha Sundaram 1E
Fri Jan 12, 2018 5:57 pm
Forum: Phase Changes & Related Calculations
Topic: Methods of Enthalpy
Replies: 8
Views: 225

Re: Methods of Enthalpy

I think we have to use different methods depending on what we're given in the problem.
by Swetha Sundaram 1E
Fri Jan 12, 2018 5:51 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

Watch out for the enthalpy pirate.....he'll steal your joules.
by Swetha Sundaram 1E
Fri Jan 12, 2018 5:46 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 8.41
Replies: 2
Views: 82

Re: Question 8.41

The enthalpy change for the water in the ice cube will be composed of two terms: the heat to melt the ice at 0 degrees Celsius and the heat required to raise the ice form 0 degrees Celsius to the final temperature.
by Swetha Sundaram 1E
Thu Dec 07, 2017 9:37 am
Forum: Administrative Questions and Class Announcements
Topic: Thursday discussion canceled? and other questions
Replies: 3
Views: 289

Re: Thursday discussion canceled? and other questions

Even though class is cancelled today, it says that campus is still open so will the review sessions held in CS 24 and 50 still be taking place?
by Swetha Sundaram 1E
Tue Dec 05, 2017 2:07 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Determinig Strength of Acids
Replies: 1
Views: 108

Re: Determinig Strength of Acids

From what I understand, I believe it depends on the type of molecule. For instance, if you're comparing HCl vs. HF, you can determine that HCl is a stronger acid by looking at the bong length (HCl has a long, weak bond). However, if you're comparing HClO2 vs. HClO, you can determine that HClO2 is a ...
by Swetha Sundaram 1E
Tue Dec 05, 2017 2:03 pm
Forum: Lewis Acids & Bases
Topic: 12.15
Replies: 3
Views: 189

Re: 12.15

Well PF5 has a neutral charge and by adding the F- ion, it results in the overall compound having a negative charge.
by Swetha Sundaram 1E
Tue Nov 28, 2017 6:19 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.9 Problem
Replies: 4
Views: 186

Re: 4.9 Problem

Well if the lone pairs weren't taken into account then it could just be trigonal planar but I think those two extra lone pairs on the iodine cause the chloride ions to have a bond angle of 90 degrees rather than 120 degrees.
by Swetha Sundaram 1E
Mon Nov 27, 2017 8:52 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Bond Order
Replies: 5
Views: 281

Re: Bond Order

For the Chapter 4 test, do we have to know what type of molecular orbital an unpaired electron would occupy? Or anything about bond order in general?
by Swetha Sundaram 1E
Wed Nov 22, 2017 2:23 pm
Forum: Naming
Topic: Question 17.29a
Replies: 3
Views: 118

Re: Question 17.29a

The name of the transition metal never really changes, it's just that when naming the molecules you use their latin names rather than the ones that appear on the periodic table.
by Swetha Sundaram 1E
Wed Nov 22, 2017 2:13 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.9 Problem
Replies: 4
Views: 186

4.9 Problem

For the molecule ICl3 can someone please explain to me why its molecular shape is T-shaped and not trigonal planar?
by Swetha Sundaram 1E
Thu Nov 16, 2017 10:10 am
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.1 Lone pairs
Replies: 6
Views: 276

Re: 4.1 Lone pairs

But in part b, there are two areas of electron density and it's linear so I thought that there wouldn't be any lone pairs. But the answer says that there may be lone pairs.
by Swetha Sundaram 1E
Thu Nov 16, 2017 9:58 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

What do chemists call a benzene ring with iron atoms replacing the carbon atoms?


A ferrous wheel.
by Swetha Sundaram 1E
Thu Nov 16, 2017 9:52 am
Forum: Lewis Structures
Topic: Midterm
Replies: 4
Views: 176

Re: Midterm

Okay cool, thanks guys!
by Swetha Sundaram 1E
Sun Nov 12, 2017 8:46 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

I am a [censored], a planet, and I can measure heat? What am I?

Mercury
by Swetha Sundaram 1E
Sun Nov 12, 2017 8:45 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

What can eat a lot of iron without getting sick?

Rust
by Swetha Sundaram 1E
Wed Nov 08, 2017 9:50 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7337
Views: 787345

Re: Post All Chemistry Jokes Here

What did the scientist say when he found 2 atoms of helium?


HeHe
by Swetha Sundaram 1E
Sat Nov 04, 2017 3:18 pm
Forum: Ionic & Covalent Bonds
Topic: covalent and ionic bonds
Replies: 3
Views: 156

Re: covalent and ionic bonds

An element can have either ionic or covalent bonds, but an ionic bond can have covalent character and vice versa.
by Swetha Sundaram 1E
Sat Nov 04, 2017 3:15 pm
Forum: Resonance Structures
Topic: Bonds
Replies: 4
Views: 195

Re: Bonds

Some atoms are stronger and essentially more stable if you can make it a double or triple bond.
by Swetha Sundaram 1E
Fri Nov 03, 2017 5:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 3D shape Lewis Diagrams
Replies: 4
Views: 217

Re: 3D shape Lewis Diagrams

So we don't need to determine which bonds will be shaded or be represented by spaced lines?
by Swetha Sundaram 1E
Fri Nov 03, 2017 11:48 am
Forum: Lewis Structures
Topic: Midterm
Replies: 4
Views: 176

Midterm

Lewis structures and the rest of chapter 3 is going to be on the midterm right?
by Swetha Sundaram 1E
Fri Oct 27, 2017 8:56 am
Forum: *Shrodinger Equation
Topic: Upcoming Test
Replies: 4
Views: 330

Re: Upcoming Test

For the Week 3 test, we just need to know the end of Chapter 1 and Chapter 2, not Chapter 3 right?
by Swetha Sundaram 1E
Fri Oct 27, 2017 8:52 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: s- electrons vs p- electrons [ENDORSED]
Replies: 7
Views: 336

Re: s- electrons vs p- electrons [ENDORSED]

From what I understand the further the atoms the electrons are from the nucleus, the more energy they have.
by Swetha Sundaram 1E
Thu Oct 19, 2017 1:50 pm
Forum: Photoelectric Effect
Topic: Post- Module Assessment #24
Replies: 3
Views: 152

Re: Post- Module Assessment #24

I think gamma rays would work, but UV light is just easier to use. I'm not completely sure though
by Swetha Sundaram 1E
Thu Oct 19, 2017 1:47 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Upcoming Test
Replies: 5
Views: 290

Re: Upcoming Test

I think our Week 3 HW can be either chapter 1 or 2, and then next week (week 4) will be chapter 2 for sure since he just started teaching us about it.
by Swetha Sundaram 1E
Tue Oct 17, 2017 6:32 am
Forum: Properties of Light
Topic: Module for Atomic Spectra Question 26
Replies: 2
Views: 144

Re: Module for Atomic Spectra Question 26

So each element and molecule have their own unique spectral pattern or fingerprint.
by Swetha Sundaram 1E
Thu Oct 12, 2017 10:44 am
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 8
Views: 296

Re: Photoelectric Effect

The photoelectric experiment has to be done under a vacuum because otherwise the ejected electrons interact with molecules in the air.
by Swetha Sundaram 1E
Thu Oct 12, 2017 10:41 am
Forum: Photoelectric Effect
Topic: Q29 from PhotoElectric Effect Post-Module Assessment
Replies: 1
Views: 111

Q29 from PhotoElectric Effect Post-Module Assessment

Hi! This may seem like a silly question, but I wasn't too sure about how to go about solving this problem. The question is: Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. How much energy is required to r...
by Swetha Sundaram 1E
Thu Oct 05, 2017 8:03 pm
Forum: Molarity, Solutions, Dilutions
Topic: G. 21
Replies: 3
Views: 296

Re: G. 21

For this problem, in part a) I first converted KCl, K2S, and K3PO4 from grams to moles and then I added each of the moles together which was 2.29 x 10^-2 mole and then I divided that by 0.5 L because Molarity multipled by Volume = moles and got 4.58 x 10^-2M. In part b) I used the grams of K2S to fi...
by Swetha Sundaram 1E
Thu Oct 05, 2017 7:43 pm
Forum: Empirical & Molecular Formulas
Topic: Problem L.35
Replies: 2
Views: 215

Problem L.35

Hey! Can anybody help me set up problem L.35 because I know I first have to balance the three reactions and then convert the tons into grams, but then afterwards do I basically work backwards from 8 mol NaBr to the mol of Fe using stoichiometry?

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