Search found 10 matches

by abram_wassily_1G
Tue Mar 14, 2017 11:58 pm
Forum: *Cycloalkenes
Topic: Multiple double bonds
Replies: 1
Views: 733

Re: Multiple double bonds

Yes, I believe we should know how to name molecules with more than one double bond present because when naming these types of molecules, we are required to mark where the double bond is present by numbering.
by abram_wassily_1G
Mon Mar 06, 2017 12:25 pm
Forum: *Cycloalkanes
Topic: Numbering of Substituents [ENDORSED]
Replies: 8
Views: 2110

Re: Numbering of Substituents [ENDORSED]

yes, Christian. You have to add up all the numbers, and the name with the lower sum is the appropriate iupac name.
by abram_wassily_1G
Wed Mar 01, 2017 10:14 pm
Forum: *Free Energy of Activation vs Activation Energy
Topic: Self-Test 4.4A
Replies: 1
Views: 300

Self-Test 4.4A

In self-test 4.4A, why does step one have the larger Ea even though step two has the larger delta G knot?
by abram_wassily_1G
Sat Feb 25, 2017 8:04 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Steady-State Approach vs. Pre-Equilibrium Approach [ENDORSED]
Replies: 2
Views: 408

Steady-State Approach vs. Pre-Equilibrium Approach [ENDORSED]

Okay so I am still not entirely sure what separates the Steady-State Approach from the Pre-Equilibrium Approach. Is it correct to assume that if the first elementary step in a reaction mechanism is slow, we use the Steady-State Approach? And, if the first elementary step in a reaction mechanism is f...
by abram_wassily_1G
Sat Feb 18, 2017 10:28 am
Forum: General Rate Laws
Topic: Difference Between K and Kprime [ENDORSED]
Replies: 1
Views: 393

Difference Between K and Kprime [ENDORSED]

In the derivations of the integrated rate laws for zero order, first order, and second order equations, what is the difference between k and kprime? Thanks.
by abram_wassily_1G
Fri Feb 10, 2017 2:59 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram for equations with 1 reactant
Replies: 1
Views: 258

Re: Cell Diagram for equations with 1 reactant

In the problem you are referring to, Au+ is oxidized and reduced. Therefore, Au+ will appear in both the oxidation half reaction and the reduction half reaction. This Au+ will appear on the left side for both of these half reactions.
by abram_wassily_1G
Sat Feb 04, 2017 12:56 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: "How does concentration affect cell potential" explanation
Replies: 1
Views: 10967

Re: "How does concentration affect cell potential" explanation

In the reaction you are referring to, Mn2+ is being reduced to Mn and Al is being oxidized to Al3+. So instead of thinking that you are adding more “positive charges,” understand that Mn2+ is gaining electrons and Al is donating electrons. Also, using Le Chatelier’s principle, an increase in concent...
by abram_wassily_1G
Sat Jan 28, 2017 9:33 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneous Reactions
Replies: 1
Views: 344

Spontaneous Reactions

Why does a negative value for the change in Gibbs's Free Energy for a specific reaction indicate that this specific reaction is spontaneous? Thanks.
by abram_wassily_1G
Sun Jan 22, 2017 3:03 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: Relationship between W and Entropy
Replies: 1
Views: 390

Relationship between W and Entropy

In looking at the course reader notes, I understand that the relationship between W and Entropy is explained by the Boltzmann equation, but how does this Boltzmann equation conceptually explain the relationship between W and Entropy? Thank you.
by abram_wassily_1G
Thu Jan 12, 2017 4:12 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies to Calculate deltaH_RXN
Replies: 1
Views: 241

Bond Enthalpies to Calculate deltaH_RXN

Method 2 (Bond Enthalpies) requires us to recognize the structure of both the reactants and products to calculate the enthalpy of reaction using bond enthalpies. In reference to method 2's example regarding the reaction between C2H4 and HBr to form CH3CH2Br, how would you recognize which bonds are b...

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