Search found 14 matches

by Aarthi_Lakshmi_2A
Sun Mar 19, 2017 12:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Saying Thank You to Dr. Lavelle
Replies: 200
Views: 41267

Re: Saying Thank You to Dr. Lavelle

Dr. Lavelle, you have no idea how much I would want you again as a professor. You're obviously very bright, enthusiastic, but most of all, kind. You always have a smile on your face, which makes chemistry seem much less daunting. Thank you for a great quarter.
by Aarthi_Lakshmi_2A
Sun Mar 19, 2017 12:29 pm
Forum: General Rate Laws
Topic: Order of Steps
Replies: 3
Views: 352

Order of Steps

Does it affect the rate law whether the slow step or the fast step comes first?
by Aarthi_Lakshmi_2A
Sun Mar 12, 2017 11:00 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Arrows
Replies: 1
Views: 280

Arrows

If arrows are supposed to point from electron rich regions and go towards electron deficient regions, why are there so many examples of arrows going from hydrogen to bromine or to chlorine? Is it because the electrons first move to hydrogen and move somewhere else from there?
by Aarthi_Lakshmi_2A
Sun Mar 12, 2017 10:56 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Carbocation
Replies: 1
Views: 314

Carbocation

How are carbocations formed, exactly? If a hydrogen with a partial positive charge attaches to one carbon, how does another carbon end up as a cation?
by Aarthi_Lakshmi_2A
Mon Mar 06, 2017 2:36 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Energy Profiles Products and Reactants
Replies: 1
Views: 259

Energy Profiles Products and Reactants

In energy profiles, do we simply write out the products and reactants or do we draw them using carbon line structures? And do we need to write something in the form [C.....A.....B] (with a superscript double crossed t) as part of our energy profile?
by Aarthi_Lakshmi_2A
Mon Mar 06, 2017 2:31 pm
Forum: *Organic Reaction Mechanisms in General
Topic: Transition States
Replies: 1
Views: 210

Transition States

How many transition states can an SN2 reaction have? Is there a limit?
by Aarthi_Lakshmi_2A
Sun Feb 26, 2017 10:04 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Steady-State Method
Replies: 1
Views: 211

Steady-State Method

Does the Steady-State method require integration? I don't quite understand how it works. And how does the Steady-State method work if there are multiple intermediates?
by Aarthi_Lakshmi_2A
Sun Feb 19, 2017 11:38 pm
Forum: General Rate Laws
Topic: Liquid Scintillation Counter
Replies: 1
Views: 210

Liquid Scintillation Counter

What is a liquid scintillation counter and how can it detect the number of high energy electrons? Why is it even necessary to detect the number of high energy electrons?
by Aarthi_Lakshmi_2A
Sun Feb 12, 2017 11:43 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram Orders
Replies: 1
Views: 201

Cell Diagram Orders

I know that for cell diagrams, the elements from the anode are on the left and the elements from the cathode are on the right. But amongst those anode and cathode sections, what is the order? Are the reactants on the left and the products on the right? I saw examples in the text book that indicated ...
by Aarthi_Lakshmi_2A
Sun Feb 05, 2017 11:41 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Spontaneous Reduction
Replies: 1
Views: 235

Spontaneous Reduction

How does a positive standard reduction potential indicate that reduction is spontaneous? Is there a specific reason? And if the standard reduction potential is negative, does that mean oxidation is spontaneous?
by Aarthi_Lakshmi_2A
Sun Jan 29, 2017 11:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: System vs. Surroundings with a Calorimeter
Replies: 1
Views: 1920

System vs. Surroundings with a Calorimeter

In a perfect system, qsys + qsurr = 0. If a reaction is taking place inside a calorimeter, is qcalorimeter the equivalent of qsurr? Or is the calorimeter also part of the system?
by Aarthi_Lakshmi_2A
Sat Jan 21, 2017 9:59 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Calorimeters [ENDORSED]
Replies: 1
Views: 233

Calorimeters [ENDORSED]

What are calorimeters typically made out of? And does the material that the calorimeter is made out of affect the specific heat capacity of the calorimeter significantly?
by Aarthi_Lakshmi_2A
Sun Jan 15, 2017 11:34 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Remaining Reactants
Replies: 1
Views: 153

Remaining Reactants

In most cases, some of the reactants won't be used up (a.k.a. They are NOT limiting reactants); does that affect the standard reaction enthalpy when one calculates delta H reaction by subtracting delta H reactants from delta H products? If so, how? Sorry for not putting the standard reaction enthalp...
by Aarthi_Lakshmi_2A
Sat Jan 14, 2017 11:44 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Sublimation
Replies: 1
Views: 198

Sublimation

I know that there is an enthalpy of sublimation, but it what cases would sublimation occur? How can the liquid state be skipped all together? Wouldn't the compound have to be liquid at some point as it transitions from solid to gas, even if it's only liquid for a minuscule period of time?

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