Search found 25 matches

by Nasir_Ahmed
Fri Mar 17, 2017 5:24 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 7253

Re: Naming [ENDORSED]

I believe you only do that when it involves alkenes or alkynes in order to distinguish where the second or third bond is.
by Nasir_Ahmed
Mon Mar 06, 2017 9:19 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Question 4.37
Replies: 2
Views: 247

Question 4.37

The question says "Comment on the possible values for standard enthalpies of activation, delta(H^o) activated complex, and the standard entropies of activation, delta(S^o)activated complex." The answer states that the delta(H^o)activated complex will always be positive and are usually much...
by Nasir_Ahmed
Thu Mar 02, 2017 9:49 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Naming Organic Molecules
Replies: 19
Views: 1685

Re: Naming Organic Molecules

How should we include names of halogens when naming the whole molecule (I know the name should include carbon and halogens only) I'm not sure what you mean by including halogens. I was under the impression that we're only dealing with hydrocarbons, and for those you really only need to know the fir...
by Nasir_Ahmed
Thu Feb 23, 2017 8:39 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Activation Energy
Replies: 4
Views: 408

Re: Activation Energy

So the rate stays relatively the same because a rise in temperature wouldn't help the reaction happen that much anyway because of the low activation energy?
by Nasir_Ahmed
Mon Feb 13, 2017 4:29 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Concentration Cells
Replies: 2
Views: 280

Re: Concentration Cells

Thank you!
by Nasir_Ahmed
Mon Feb 13, 2017 2:30 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Concentration Cells
Replies: 2
Views: 280

Concentration Cells

In the course reader, it says that when you have a galvanic or voltaic cell with the same components at different concentrations, the standard reduction potential will always be 0 V. Why is that?
by Nasir_Ahmed
Fri Feb 10, 2017 7:54 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Determing salt bridge
Replies: 4
Views: 428

Re: Determing salt bridge

^ I'm pretty sure it's just any metal.
by Nasir_Ahmed
Sat Feb 04, 2017 1:11 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst Equation [ENDORSED]
Replies: 4
Views: 425

Nernst Equation [ENDORSED]

Hey guys, I wasn't able to make lecture on Friday but I looked through the course reader and I'm confused with the Nernst Equation. How is the variable 0.05916 derived?
by Nasir_Ahmed
Sat Jan 28, 2017 2:28 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Quiz 1 Prep #5
Replies: 5
Views: 832

Re: Quiz 1 Prep #5

There's no error. You always have to balance the equation before you even get started. So a final product of 2NH3 is correct.
by Nasir_Ahmed
Mon Jan 23, 2017 10:23 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Hmwk Problem 8.91
Replies: 1
Views: 138

Hmwk Problem 8.91

I understand in this problem when you assume it took 10 hrs for the ice to melt, but in the solutions manual it says to divide 10 hrs by the half hour it took for the water to reach 5 degrees Celsius and then multiply it by the 3135 J it took to get it there...my question is, why do we divide the 10...
by Nasir_Ahmed
Mon Jan 23, 2017 3:49 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.93 part c
Replies: 2
Views: 248

Re: 8.93 part c

I was also confused by this, but I assumed it was because it was internal energy in its standard state.
by Nasir_Ahmed
Tue Jan 17, 2017 4:49 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: HW question 8.67
Replies: 1
Views: 176

Re: HW question 8.67

I believe it isn't in the liquid state because the values given in tables 8.6 and 8.7 are for the compounds in the gaseous state. That is why we have to go through the process of subtracting it by the delta H of vaporization.
by Nasir_Ahmed
Tue Jan 17, 2017 4:23 pm
Forum: Calculating Work of Expansion
Topic: Hmwk Problem 8.67 [ENDORSED]
Replies: 2
Views: 308

Re: Hmwk Problem 8.67 [ENDORSED]

Thank you. That was very helpful.
by Nasir_Ahmed
Mon Jan 16, 2017 10:01 pm
Forum: Calculating Work of Expansion
Topic: Hmwk Problem 8.67 [ENDORSED]
Replies: 2
Views: 308

Hmwk Problem 8.67 [ENDORSED]

I'm having some trouble with part a) on problem 8.67. It's asking to find the enthalpy of formation of H2O in the liquid state, but in the solution you have to factor in breaking the bonds between H2 and O2. If we're trying to find the enthalpy of formation, why do we have to calculate the energy to...
by Nasir_Ahmed
Fri Jan 13, 2017 7:40 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity
Replies: 3
Views: 378

Re: Heat Capacity

A good way to remember it is that an extensive property is reliant on external conditions (aka the amount of substance) and an intensive property has more to do with individual units so external forces don't matter as much.
by Nasir_Ahmed
Mon Nov 28, 2016 2:43 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted vs Lewis Acid Definition
Replies: 2
Views: 294

Bronsted vs Lewis Acid Definition

I was reading the book and the definitions for Bronsted and Lewis acids seemed to be the opposite of each other and the wording was a bit confusing to me. Could anyone help clarify?
by Nasir_Ahmed
Sat Nov 26, 2016 5:45 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pKa for Weak Acids [ENDORSED]
Replies: 2
Views: 367

Re: pKa for Weak Acids [ENDORSED]

Ah yes okay thank you. I must've missed it in the notes.
by Nasir_Ahmed
Fri Nov 25, 2016 11:25 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pKa for Weak Acids [ENDORSED]
Replies: 2
Views: 367

pKa for Weak Acids [ENDORSED]

Okay, this is probably a ridiculous question, but when finding the pH or pOH of weak acids and bases what does the "p" in front of the Ka or Kb represent? Is it something we should know?
by Nasir_Ahmed
Mon Nov 14, 2016 2:00 pm
Forum: Naming
Topic: Prefixes in Naming Order [ENDORSED]
Replies: 2
Views: 250

Prefixes in Naming Order [ENDORSED]

I keep seeing online that prefixes like "di-" or "tri-" supersede alphabetical order when it comes to the ligands in naming coordination compounds. Is that true? From what I've gotten in class is that it's only based on alphabetical order.
by Nasir_Ahmed
Fri Nov 04, 2016 2:59 pm
Forum: General Science Questions
Topic: * and Antibonding
Replies: 1
Views: 905

* and Antibonding

So I just wanted to double check something. When talking about molecular orbitals, the * next to like a sigma means it is antibonding?
by Nasir_Ahmed
Fri Oct 28, 2016 7:08 pm
Forum: General Science Questions
Topic: Hybridization
Replies: 1
Views: 439

Hybridization

I'm not sure if I just missed Professor Lavelle's explanation of it, but could someone help me understand what Hybridization actually is? Is it just when elements bond with Hydrogen?
by Nasir_Ahmed
Fri Oct 21, 2016 4:35 pm
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi Bonds for Quiz 2
Replies: 3
Views: 532

Sigma and Pi Bonds for Quiz 2

I'm a bit confused. We haven't covered sigma or pi bonds in our lectures or discussion sections. Will they be as prevalent on the Quiz as they are on the practice quizzes?
by Nasir_Ahmed
Fri Oct 14, 2016 5:55 pm
Forum: Ionic & Covalent Bonds
Topic: The Octet
Replies: 3
Views: 407

The Octet

Is there any way for an atom to have more than 8 valence electrons? Would that make it insanely unstable?
by Nasir_Ahmed
Thu Oct 06, 2016 5:58 pm
Forum: Properties of Light
Topic: Hmwk Problem 1.9 [ENDORSED]
Replies: 6
Views: 468

Hmwk Problem 1.9 [ENDORSED]

I was wondering if anyone could help me with problem 1.9 in the textbook. I'm not sure exactly how I'm supposed to deduce everything in the table from the information given. It doesn't seem like enough to go off of. Thanks
by Nasir_Ahmed
Wed Sep 28, 2016 12:07 pm
Forum: General Science Questions
Topic: Light as a Wave
Replies: 3
Views: 565

Light as a Wave

So light as a wave is not an actual fact? It is just a mathematical representation to help us understand the equation? Do we have any idea how light moves?

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