CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

Topics

Posts

Last post

Ideal Gases
$PV=nRT$
Moderators: Chem_Mod, Chem_Admin
Topics: 242

242 Topics

1213 Posts

Last post Re: units
by Celio_G_Dis2C View the latest post
Thu Feb 21, 2019 1:52 am
Equilibrium Constants & Calculating Concentrations
Moderators: Chem_Mod, Chem_Admin
Topics: 1714

1714 Topics

5194 Posts

Last post Re: Midterm Ice Table
by Jeannine 1I View the latest post
Wed Feb 20, 2019 10:18 pm
Non-Equilibrium Conditions & The Reaction Quotient
Moderators: Chem_Mod, Chem_Admin
Topics: 257

257 Topics

1008 Posts

Last post Re: Midterm Question
by Kathryn Wilhem 1I View the latest post
Wed Feb 20, 2019 10:06 pm
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Moderators: Chem_Mod, Chem_Admin
Topics: 415

415 Topics

1478 Posts

Last post Re: Le Chatelier's Principle
by Shibhon_Shepard View the latest post
Wed Feb 20, 2019 1:41 pm

Thermochemistry

Topics

Posts

Last post

Phase Changes & Related Calculations
Moderators: Chem_Mod, Chem_Admin
Topics: 958

958 Topics

3565 Posts

Last post Re: joules conversion factor
by Chase Yonamine 1J View the latest post
Fri Feb 22, 2019 10:29 am
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Moderators: Chem_Mod, Chem_Admin
Topics: 1834

1834 Topics

5392 Posts

Last post Re: units
by KatrinaPho_2I View the latest post
Fri Feb 22, 2019 11:42 am
Heat Capacities, Calorimeters & Calorimetry Calculations
Moderators: Chem_Mod, Chem_Admin
Topics: 994

994 Topics

3007 Posts

Last post Re: q=mCdeltaT
by Xingzheng Sun 2K View the latest post
Wed Feb 20, 2019 11:33 pm

Thermodynamics

Topics

Posts

Last post

Thermodynamic Systems (Open, Closed, Isolated)
Moderators: Chem_Mod, Chem_Admin
Topics: 436

436 Topics

1759 Posts

Last post Re: Midterm #1 14B
by abbydouglas1K View the latest post
Fri Feb 22, 2019 9:18 am
Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$
Moderators: Chem_Mod, Chem_Admin
Topics: 349

349 Topics

1159 Posts

Last post Re: Isochoric
by MadisonB View the latest post
Fri Feb 22, 2019 10:20 am
Calculating Work of Expansion
$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$
Moderators: Chem_Mod, Chem_Admin
Topics: 638

638 Topics

2023 Posts

Last post Re: Nonexpansion work vs expa…
by Tony Ong 3K View the latest post
Fri Feb 22, 2019 12:05 am
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
Moderators: Chem_Mod, Chem_Admin
Topics: 805

805 Topics

2330 Posts

Last post Re: Work done vs work on syst…
by Ricardo Martin 1J View the latest post
Wed Feb 20, 2019 9:20 am
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
Moderators: Chem_Mod, Chem_Admin
Topics: 785

785 Topics

2226 Posts

Last post Re: S=qrev/ T
by abbydouglas1K View the latest post
Fri Feb 22, 2019 9:09 am
Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Boltzmann Equation for Entropy: $S = k_{B} \ln W$
Moderators: Chem_Mod, Chem_Admin
Topics: 346

346 Topics

964 Posts

Last post Re: HW 9.25: Understanding Mo…
by Ashley P 4I View the latest post
Thu Feb 21, 2019 7:32 am
Entropy Changes Due to Changes in Volume and Temperature
Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$
Moderators: Chem_Mod, Chem_Admin
Topics: 705

705 Topics

2014 Posts

Last post Re: delta S= q(rev)/ T
by Hai-Lin Yeh 1J View the latest post
Fri Feb 22, 2019 10:44 am
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Moderators: Chem_Mod, Chem_Admin
Topics: 262

262 Topics

814 Posts

Last post Re: Problem 9.89-Sixth Edition
by Chem_Mod View the latest post
Thu Feb 21, 2019 5:27 pm
Gibbs Free Energy Concepts and Calculations
$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$
Moderators: Chem_Mod, Chem_Admin
Topics: 917

917 Topics

2730 Posts

Last post Re: Gibbs free energy at phas…
by Alexa_Henrie_1I View the latest post
Fri Feb 22, 2019 12:00 pm
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
Moderators: Chem_Mod, Chem_Admin
Topics: 65

65 Topics

243 Posts

Last post Re: Practice Problems
by Alexa_Henrie_1I View the latest post
Fri Feb 22, 2019 12:04 pm
Environment, Fossil Fuels, Alternative Fuels
Moderators: Chem_Mod, Chem_Admin
Topics: 12

12 Topics

37 Posts

Last post Re: midterm
by Ashley P 4I View the latest post
Thu Feb 21, 2019 7:25 am
Biological Examples (*DNA Structural Transitions, etc.)
Moderators: Chem_Mod, Chem_Admin
Topics: 11

11 Topics

32 Posts

Last post Re: Structures of the Human B…
by LedaKnowles2E View the latest post
Fri Feb 15, 2019 1:24 pm

Electrochemistry

Topics

Posts

Last post

Balancing Redox Reactions
Moderators: Chem_Mod, Chem_Admin
Topics: 770

770 Topics

2436 Posts

Last post Re: oxidation state of MnO4-
by Tarika Gujral 1K View the latest post
Fri Feb 22, 2019 12:18 pm
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Moderators: Chem_Mod, Chem_Admin
Topics: 1455

1455 Topics

3892 Posts

Last post Salt Bridge
by Emily Ng_4C View the latest post
Fri Feb 22, 2019 12:29 pm
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
Moderators: Chem_Mod, Chem_Admin
Topics: 307

307 Topics

926 Posts

Last post Re: Gibbs and Work
by Griffin Carter 2I View the latest post
Fri Feb 22, 2019 11:56 am
Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$
Moderators: Chem_Mod, Chem_Admin
Topics: 489

489 Topics

1338 Posts

Last post Finding K or Q with Nernst's …
by sallina_yehdego 2E View the latest post
Fri Feb 22, 2019 9:24 am
Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Moderators: Chem_Mod, Chem_Admin
Topics: 77

77 Topics

191 Posts

Last post Re: Recharging Batteries
by KatrinaPho_2I View the latest post
Fri Feb 22, 2019 11:35 am

Chemical Kinetics

Topics

Posts

Last post

Kinetics vs. Thermodynamics Controlling a Reaction
Moderators: Chem_Mod, Chem_Admin
Topics: 216

216 Topics

729 Posts

Last post Re: Activation energy
by Aidan Ryan 1B View the latest post
Tue Feb 19, 2019 12:52 pm
General Rate Laws
$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$
Moderators: Chem_Mod, Chem_Admin
Topics: 623

623 Topics

1915 Posts

Last post Re: test 3
by Millicent Navarro 1I View the latest post
Tue Feb 19, 2019 5:50 pm
Method of Initial Rates (To Determine n and k)
Moderators: Chem_Mod, Chem_Admin
Topics: 236

236 Topics

729 Posts

Last post Re: sign of k
by Katelyn B 2E View the latest post
Sat Mar 17, 2018 11:16 pm
Zero Order Reactions
$\frac{d[R]}{dt}=-k; [R]=-kt + [R]_{0}; t_{\frac{1}{2}}=\frac{[R]_{0}}{2k}$
Moderators: Chem_Mod, Chem_Admin
Topics: 104

104 Topics

399 Posts

Last post Re: Half life
by Juanalv326 View the latest post
Sat Mar 17, 2018 11:58 pm
First Order Reactions
$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$
Moderators: Chem_Mod, Chem_Admin
Topics: 251

251 Topics

849 Posts

Last post Re: k' in Pseudo-First-Order …
by Christina Bedrosian 1B View the latest post
Sun Mar 18, 2018 5:17 pm
Second Order Reactions
$\frac{d[R]}{dt}=-k[R]^{2}; \frac{1}{[R]}=kt + \frac{1}{[R]_{0}}; t_{\frac{1}{2}}=\frac{1}{k[R]_{0}}$
Moderators: Chem_Mod, Chem_Admin
Topics: 141

141 Topics

458 Posts

Last post Re: Derivations
by Christina Cen 2J View the latest post
Sun Mar 18, 2018 3:18 pm
Reaction Mechanisms, Reaction Profiles
$K = \frac{k_{forward}}{k_{reverse}}$
Moderators: Chem_Mod, Chem_Admin
Topics: 541

541 Topics

1584 Posts

Last post Re: k1 and k2
by AnuPanneerselvam1H View the latest post
Wed Mar 21, 2018 5:59 am
Arrhenius Equation, Activation Energies, Catalysts
Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$
Moderators: Chem_Mod, Chem_Admin
Topics: 452

452 Topics

1310 Posts

Last post Re: Arrhenius equation
by AnuPanneerselvam1H View the latest post
Wed Mar 21, 2018 5:57 am
*Enzyme Kinetics
$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$
Moderators: Chem_Mod, Chem_Admin
Topics: 43

43 Topics

157 Posts

Last post Re: Catalyst and equilibrium …
by Katelyn B 2E View the latest post
Sun Mar 18, 2018 12:02 am
Experimental Details
Moderators: Chem_Mod, Chem_Admin
Topics: 22

22 Topics

71 Posts

Last post Re: Activated Complex vs. Tra…
by Alexander Peter 1F View the latest post
Sun Mar 18, 2018 12:31 am
Environment, Ozone, CFCs
Moderators: Chem_Mod, Chem_Admin
Topics: 3

3 Topics

7 Posts

Last post Re: Radical Chain Reactions
by David Minasyan 1C View the latest post
Fri Mar 16, 2018 12:47 pm
Biological Examples
Moderators: Chem_Mod, Chem_Admin
Topics: 7

7 Topics

20 Posts

Last post Re: SN2 Reactions
by Chem_Mod View the latest post
Wed Mar 14, 2018 9:53 pm

*Thermodynamics and Kinetics of Organic Reactions

Topics

Posts

Last post

*Electrophiles
Moderators: Chem_Mod, Chem_Admin
Topics: 134

134 Topics

396 Posts

Last post Re: How do you categorize Ele…
by Sarah Maraach 2K View the latest post
Sun Mar 18, 2018 7:57 am
*Nucleophiles
Moderators: Chem_Mod, Chem_Admin
Topics: 135

135 Topics

371 Posts

Last post Re: SN2 Reactions
by 604807557 View the latest post
Sun Mar 18, 2018 9:33 pm
*Organic Reaction Mechanisms in General
Moderators: Chem_Mod, Chem_Admin
Topics: 294

294 Topics

717 Posts

Last post Re: Functional Groups Overlap…
by diangelosoriano View the latest post
Fri Mar 16, 2018 10:32 pm
*Electrophilic Addition
Moderators: Chem_Mod, Chem_Admin
Topics: 102

102 Topics

250 Posts

Last post Re: nucleophile and electroph…
by Cassandra Mullen 1E View the latest post
Fri Mar 16, 2018 7:40 pm
*Nucleophilic Substitution
Moderators: Chem_Mod, Chem_Admin
Topics: 38

38 Topics

103 Posts

Last post Re: Transition States
by melissa carey 1f View the latest post
Sat Mar 17, 2018 10:39 am
*Free Energy of Activation vs Activation Energy
Moderators: Chem_Mod, Chem_Admin
Topics: 128

128 Topics

302 Posts

Last post Re: Spontaneous reactions
by Angel Chen 2k View the latest post
Wed Feb 20, 2019 12:27 am
*Complex Reaction Coordinate Diagrams
Moderators: Chem_Mod, Chem_Admin
Topics: 23

23 Topics

58 Posts

Last post Re: Unique Rate.
by Jacob Cho 2L View the latest post
Wed Mar 07, 2018 3:03 am

*Names and Structures of Organic Molecules

Topics

Posts

Last post

*Alkanes
Moderators: Chem_Mod, Chem_Admin
Topics: 585

585 Topics

1654 Posts

Last post Re: Final
by Troy Tavangar 1I View the latest post
Sat Mar 17, 2018 11:51 pm
*Cycloalkanes
Moderators: Chem_Mod, Chem_Admin
Topics: 216

216 Topics

575 Posts

Last post Re: SN2
by Chem_Mod View the latest post
Sun Mar 18, 2018 8:34 pm
*Alkenes
Moderators: Chem_Mod, Chem_Admin
Topics: 211

211 Topics

540 Posts

Last post Re: Cis/ Trans
by divya_devineni_2E View the latest post
Sun Mar 19, 2017 9:18 pm
*Cycloalkenes
Moderators: Chem_Mod, Chem_Admin
Topics: 150

150 Topics

410 Posts

Last post Re: Where to start counting W…
by 104469125 View the latest post
Sun Mar 19, 2017 5:43 am
*Alkynes
Moderators: Chem_Mod, Chem_Admin
Topics: 42

42 Topics

108 Posts

Last post Re: Alkyne Naming
by Jeannie_Kim_1I View the latest post
Sat Mar 11, 2017 1:08 pm
*Constitutional and Geometric Isomers (cis, Z and trans, E)
Moderators: Chem_Mod, Chem_Admin
Topics: 217

217 Topics

586 Posts

Last post Re: Determining cis, z, trans…
by Vincent Tse 2B View the latest post
Sun Mar 19, 2017 11:54 pm
*Haloalkanes
Moderators: Chem_Mod, Chem_Admin
Topics: 27

27 Topics

73 Posts

Last post Re: Transition states and mec…
by feodora_r_3d View the latest post
Sat Mar 18, 2017 10:19 pm
*Haloalkenes
Moderators: Chem_Mod, Chem_Admin
Topics: 18

18 Topics

44 Posts

Last post Re: Green Book Chapter 2 Ques…
by William_Lee_Dis_3H View the latest post
Fri Mar 17, 2017 1:14 am
*Alcohols
Moderators: Chem_Mod, Chem_Admin
Topics: 108

108 Topics

260 Posts

Last post Re: study tips
by Yang Chen 2E View the latest post
Sat Mar 17, 2018 7:50 pm
*Ethers
Moderators: Chem_Mod, Chem_Admin
Topics: 61

61 Topics

158 Posts

Last post Re: Nucleophile
by 804899546 View the latest post
Thu Mar 15, 2018 8:44 pm
*Aldehydes
Moderators: Chem_Mod, Chem_Admin
Topics: 27

27 Topics

63 Posts

Last post Re: Carbonyl -> Aldehydes and…
by Jessica_Singh_1J View the latest post
Fri Mar 16, 2018 7:15 pm
*Ketones
Moderators: Chem_Mod, Chem_Admin
Topics: 37

37 Topics

88 Posts

Last post Re: Keytone and Aldeyhdes
by AtreyiMitra2L View the latest post
Sat Mar 17, 2018 9:46 pm
*Carboxylic Acids
Moderators: Chem_Mod, Chem_Admin
Topics: 20

20 Topics

45 Posts

Last post Re: Functional Groups
by Phillip Tran View the latest post
Sun Mar 18, 2018 4:02 pm
*Amines
Moderators: Chem_Mod, Chem_Admin
Topics: 49

49 Topics

120 Posts

Last post Re: Conditions for being an A…
by John Huang 1G View the latest post
Sat Mar 17, 2018 12:36 pm
*Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Moderators: Chem_Mod, Chem_Admin
Topics: 61

61 Topics

143 Posts

Last post Re: Final
by Phillip Tran View the latest post
Sun Mar 18, 2018 4:08 pm

*Conformations of Organic Molecules

Topics

Posts

Last post

*Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
Moderators: Chem_Mod, Chem_Admin
Topics: 233

233 Topics

598 Posts

Last post Re: nucleophiles
by Jaewoo Jo 2L View the latest post
Sun Mar 18, 2018 9:54 pm
*Cyclopropanes and Cyclobutanes
Moderators: Chem_Mod, Chem_Admin
Topics: 39

39 Topics

99 Posts

Last post Re: Torsional Strain
by William Shu 1G View the latest post
Sun Mar 19, 2017 12:34 pm
*Cyclopentanes
Moderators: Chem_Mod, Chem_Admin
Topics: 14

14 Topics

40 Posts

Last post Re: Envelope Conformation
by Chem_Mod View the latest post
Sat Mar 18, 2017 11:11 pm
*Cyclohexanes (Chair, Boat, Geometric Isomers)
Moderators: Chem_Mod, Chem_Admin
Topics: 193

193 Topics

479 Posts

Last post Re: Most stable confirmation?
by Hyun Young Lee 2H View the latest post
Mon Mar 20, 2017 4:28 pm
*Calculations Using ΔG° = -RT ln K
Moderators: Chem_Mod, Chem_Admin
Topics: 25

25 Topics

66 Posts

Last post Re: Vocabulary
by Jaewoo Jo 2L View the latest post
Sun Mar 18, 2018 9:58 pm
*ChemDraw
Moderators: Chem_Mod, Chem_Admin
Topics: 17

17 Topics

43 Posts

Last post Re: draw
by Mishta Stanislaus 1H View the latest post
Sun Mar 18, 2018 8:21 pm
*Chem3D
Moderators: Chem_Mod, Chem_Admin
Topics: 25

25 Topics

70 Posts

Last post Re: The meaning of "dihedral"
by lisabang2L View the latest post
Sat Mar 18, 2017 10:56 pm

Forum

Topics

Posts

Last post

Student Social/Study Group
This forum topic is for students to self-organize study groups, etc.
Moderators: Chem_Mod, Chem_Admin
Topics: 113

113 Topics

603 Posts

Last post Re: Midterm Results
by KatrinaPho_2I View the latest post
Fri Feb 22, 2019 11:37 am
Administrative Questions and Class Announcements
General non-science questions and class announcements.
Moderators: Chem_Mod, Chem_Admin
Topics: 462

462 Topics

2837 Posts

Last post Re: Yekan Discussion slides (…
by Chem_Mod View the latest post
Thu Feb 21, 2019 8:20 am
General Science Questions
Science questions not covered in Chem 14A and 14B. Try to limit questions to chemistry (inorganic chemistry, physical chemistry, organic chemistry, biophysical chemistry, biochemistry, materials science, environmental chemistry).
Moderators: Chem_Mod, Chem_Admin
Topics: 119

119 Topics

371 Posts

Last post Re: Midterm
by Casandra View the latest post
Wed Feb 20, 2019 10:38 pm

Who is online

Users browsing this forum: No registered users and 2 guests