Search found 11 matches

by TotalChem
Sun Mar 13, 2016 7:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam
Replies: 3
Views: 3186

Re: Final Exam

It was pretty fair and representative, thank you so much :)
by TotalChem
Thu Mar 10, 2016 11:44 pm
Forum: General Science Questions
Topic: 3 Substituents
Replies: 3
Views: 769

Re: 3 Substituents

No, you only need to consider cis and trans where are two substitutents. :)
by TotalChem
Mon Mar 07, 2016 10:44 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Equation for E
Replies: 1
Views: 344

Re: Equation for E

E = E° - (RT/nF)lnQ and E = E° - (.05916 Volts/n)logQ?
by TotalChem
Sun Feb 28, 2016 11:20 pm
Forum: *Alkanes
Topic: Chart from Class
Replies: 1
Views: 215

Re: Chart from Class


There you go! :)
by TotalChem
Sun Feb 21, 2016 11:46 pm
Forum: *Nucleophiles
Topic: Ambident Nucleophile
Replies: 2
Views: 472

Re: Ambident Nucleophile

That is the answer because it is both negative and around the central Atom are extreme/unlike atoms that cause resonance, as opposed to, for example, 3 hydrogen atoms surrounding the central atom
by TotalChem
Wed Feb 17, 2016 11:45 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Energetically favorable vs spontaneous reaction profile
Replies: 1
Views: 325

Re: Energetically favorable vs spontaneous reaction profile

I believe energetically favorable means the Delta G is negative but activation energy is required for the event to take place, while for spontaneous, the event merely takes place without the need of activation energy
by TotalChem
Mon Feb 08, 2016 10:04 am
Forum: Phase Changes & Related Calculations
Topic: 2011 Question 3
Replies: 1
Views: 270

Re: 2011 Question 3

Kelvin is simply preferred, but I believe you're fine unless it specifically specifies for Kelvin (like how for one of the practice midterms, it makes you convert the final answer from mL to L).
by TotalChem
Sun Jan 31, 2016 9:25 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 3
Views: 377

Re: Bond Enthalpies

Bond enthalpy is the energy needed to break a bond. But the heat formation takes into account all bonds of a chemical reaction: it is the difference of bonds broken and bonds gained.
by TotalChem
Sun Jan 24, 2016 2:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy
Replies: 1
Views: 277

Gibbs Free Energy

I have a question on the middle workbook quiz (quiz 1, of course), question 8. It says "For the reaction 2C(s) + 2H²(g) -> C²H⁴(g) [not exponents)] ∆Hr° = +52.3 kJ/mol and ∆Sr° = -53.07 J/(K•mol) at 298K. At what temperature will this rxn be spontaneous?" The answer is "no temperature...
by TotalChem
Sun Jan 10, 2016 11:36 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Internal Energy and Heat
Replies: 1
Views: 666

Re: Internal Energy and Heat

According to the 1st law of thermodynamics, energy cannot be created or destroyed, it can be only be converted (through heat and work). So the change in internal energy of a system is equal to the heat exchanged between a system and its surroundings plus the work that the system does or receives. Th...
by TotalChem
Mon Nov 30, 2015 6:33 pm
Forum: Naming
Topic: Naming Coordination Complexes
Replies: 1
Views: 285

Naming Coordination Complexes

Hello. It's David Yeghyayan from Lecture 3.

Sorry that the video is upside down :)

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