Search found 11 matches

by Sergio Alvarez 2L
Thu Mar 10, 2016 1:45 am
Forum: *Organic Reaction Mechanisms in General
Topic: Geometry of transition states
Replies: 1
Views: 479

Geometry of transition states

What part of the transition state do you look at to figure out the geometry of it?
by Sergio Alvarez 2L
Tue Mar 01, 2016 9:58 pm
Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Topic: Quiz 3 Prep
Replies: 2
Views: 448

Re: Quiz 3 Prep

Lavelle answered this same question and said that you always take into account alphabetical order when naming, so the correct answer should actually be 1-bromo-3-iodo-cyclohexane.
by Sergio Alvarez 2L
Tue Mar 01, 2016 8:57 pm
Forum: *Cycloalkanes
Topic: Naming Compounds
Replies: 1
Views: 313

Naming Compounds

In what case would you assign the lowest number to the substituent that comes first in the alphabet versus assigning it the one with the higher atomic number? For example #5 on the first prep quiz 3, calling the compound 1-bromo-3-iodo-cyclohexane vs 3-bromo-1-iodo-cyclohexane.
by Sergio Alvarez 2L
Thu Feb 25, 2016 3:45 pm
Forum: Second Order Reactions
Topic: Question 15.39A
Replies: 1
Views: 310

Question 15.39A

When you are trying to calculate the time required for the reaction to take place, why don't you take into account the mole ratio in the equation? 2A---->B+C
by Sergio Alvarez 2L
Mon Feb 22, 2016 8:38 pm
Forum: First Order Reactions
Topic: Homework 15.23
Replies: 1
Views: 317

Homework 15.23

For part c, when trying to find [A]t, why do you subtract the value found from the mole ratio from 0.153, the value of [A]0?
by Sergio Alvarez 2L
Wed Feb 17, 2016 10:49 am
Forum: First Order Reactions
Topic: First-order reaction equations
Replies: 1
Views: 296

First-order reaction equations

For first order reactions, when do you use the equation ln[A]= -kt+ln[A]0 versus [A]=[A]0*e^-kt?
by Sergio Alvarez 2L
Mon Feb 08, 2016 11:12 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Calculating equilibrium constants
Replies: 1
Views: 256

Calculating equilibrium constants

Does using E=E - 0.0592/nLOGQ vs E= - RT/nFlnQ give you the same answer when calculating an equilibrium constant?
by Sergio Alvarez 2L
Thu Jan 28, 2016 11:58 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Problem 9.13
Replies: 1
Views: 229

Problem 9.13

When you are calculating the change entropy based on the increase in temperature, the solutions manual shows that you use the equation nRln(T2/T1). Why do you use this equation instead of using the nCln(T2/T1)?
by Sergio Alvarez 2L
Sun Jan 24, 2016 9:53 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible and Isothermal
Replies: 2
Views: 525

Reversible and Isothermal

When an ideal gas is expanding isothermally and reversibly, why does q=-w?
by Sergio Alvarez 2L
Sun Jan 17, 2016 3:07 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Homework Problem 8.57
Replies: 1
Views: 307

Homework Problem 8.57

When you are balancing the third equation that you come up with that involves H2(g) why is the balanced equation H2(g) + 1/2 O2(g)--->H20(l)? Why doesn't 2H2(g) + O2(g)---> 2H20(l) work, since the equation is still balanced this way?
by Sergio Alvarez 2L
Sun Jan 10, 2016 8:40 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: State Properties
Replies: 2
Views: 428

Re: State Properties

U is supposed to be E for energy. P is pressure, V is volume, and T is temperature.

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