Search found 12 matches

by Gabriel Esmailian 1F
Fri Mar 11, 2016 5:07 pm
Forum: *Alkenes
Topic: Double Bond Vs Alcohol Number Priority
Replies: 1
Views: 2363

Double Bond Vs Alcohol Number Priority

Looking at hw question 40 in chapter 2 of the organic textbook for reference.
When there is a functional group like an alcohol or aldehyde and a double bond, which gets priority or does it just depend on whichever number pairing gives the lower numbers?
by Gabriel Esmailian 1F
Wed Mar 09, 2016 7:13 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Change in energy from substituents
Replies: 1
Views: 357

Re: Change in energy from substituents

I think it just depends what the confirmation is already and where substituent is placed within the molecule. If you have a confirmation like a boat confirmation and you add a CH3 substituent to the flagpole carbon, the energy will increase due to the increased amount of steric interactions with the...
by Gabriel Esmailian 1F
Wed Mar 02, 2016 11:34 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Quiz 2 2015 practice
Replies: 2
Views: 411

Re: Quiz 2 2015 practice

Start by finding the activation energy given the two rate constants k1 and k2 and two temperatures T1 and T2. Once you find the activation energy you use it with the new given temperature of 790 K and the previous temperature 350 K.
by Gabriel Esmailian 1F
Fri Feb 26, 2016 1:16 pm
Forum: *Alkanes
Topic: Double Headed Arrow
Replies: 4
Views: 725

Re: Double Headed Arrow

Heather Lindsay 1H wrote:How do we know to use a double headed arrow? When a bond breaks, are two electrons considered to be transferred?


Yes, for bond breaks two electrons are transferred and thus a double arrow is used.
by Gabriel Esmailian 1F
Sun Feb 21, 2016 9:05 am
Forum: General Science Questions
Topic: sig figs if problem uses ln
Replies: 2
Views: 999

Re: sig figs if problem uses ln

sig figs when using logarithms represent the number of decimal places used within the logarithm. Ex: log .5 would give 1 sig fig and log .12 would have 2.
by Gabriel Esmailian 1F
Sat Feb 13, 2016 11:19 am
Forum: General Rate Laws
Topic: Half-Lifes
Replies: 2
Views: 378

Re: Half-Lifes

You could for the first order reaction since half life depends only on k. However for second order reactions, there is also a dependance on the initial concentration value so it may be harder to justify.
by Gabriel Esmailian 1F
Sat Jan 30, 2016 6:32 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isothermal, Delta U = 0
Replies: 2
Views: 690

Re: Isothermal, Delta U = 0

Both situations are the same. The signs just refer to whether the system is doing work, losing energy, etc. So depending on the situation, the q or w could be negative.
by Gabriel Esmailian 1F
Sun Jan 24, 2016 2:40 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 3
Views: 450

Re: Hess's Law

Multiplying/dividing in addition to flipping the direction of the reaction around when adding or subtracting. Just make sure that when you flip a reaction the delta H value associated with it takes on a negative sign.
by Gabriel Esmailian 1F
Sun Jan 24, 2016 2:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Workbook Quizzes
Replies: 3
Views: 504

Re: Workbook Quizzes

I believe you do each workbook quiz, and at the end the combined workbook quiz scores will replace your lowest in class discussion quiz you take.
by Gabriel Esmailian 1F
Sat Jan 16, 2016 6:23 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpy
Replies: 2
Views: 697

Re: Bond Enthalpy

In order to break a bond, energy is needed. This uptake in energy constitutes a positive enthalpy value. On the other hand, to make bonds energy is release, and thus enthalpy value will be negative because energy is leaving the system.
by Gabriel Esmailian 1F
Sat Jan 09, 2016 4:56 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Heat vs. Specific Heat Capacity
Replies: 4
Views: 1921

Re: Heat vs. Specific Heat Capacity

Heat Capacity will be less useful because it is the amount of energy in the form of heat needed to raise the temperature of the whole object by 1 degree C. Depending on the size of the object, more energy may be needed. For example, more energy will be needed to heat a 5 gallon tank of water 1 degre...

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