CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

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Ideal Gases
$PV=nRT$
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Topics: 128

128 Topics

480 Posts

Last post Re: Reading the textbook
by 904837647 View the latest post
Sun Dec 09, 2018 2:12 am
Equilibrium Constants & Calculating Concentrations
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Topics: 919

919 Topics

2386 Posts

Last post Re: Le Chatelier's Principle
by Chem_Mod View the latest post
Wed Jun 13, 2018 9:33 pm
Non-Equilibrium Conditions & The Reaction Quotient
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Topics: 125

125 Topics

374 Posts

Last post Re: ICE table question
by juliaschreib1A View the latest post
Sun Jun 03, 2018 10:25 pm
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
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Topics: 214

214 Topics

592 Posts

Last post Re: what is lechatliers princ…
by Chem_Mod View the latest post
Thu Jun 14, 2018 3:11 pm

Thermochemistry

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Phase Changes & Related Calculations
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Topics: 783

783 Topics

2705 Posts

Last post Re: Steam
by Phillip Tran View the latest post
Sun Mar 18, 2018 4:00 pm
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
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Topics: 1511

1511 Topics

4226 Posts

Last post Re: Is enthalpy a state funct…
by Phillip Tran View the latest post
Sun Mar 18, 2018 3:51 pm
Heat Capacities, Calorimeters & Calorimetry Calculations
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Topics: 807

807 Topics

2337 Posts

Last post Re: Putting an Ice cube into …
by Phillip Tran View the latest post
Sun Mar 18, 2018 4:03 pm

Thermodynamics

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Thermodynamic Systems (Open, Closed, Isolated)
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Topics: 331

331 Topics

1172 Posts

Last post Re: First Law
by AlyssaPeckham1A View the latest post
Sun Mar 18, 2018 3:07 am
Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$
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Topics: 283

283 Topics

889 Posts

Last post Re: Delta U
by Hubert Tang-1H View the latest post
Mon Mar 19, 2018 11:59 am
Calculating Work of Expansion
$w=-P\Delta V$
and
$w=-\int_{V_{1}}^{V_{2}}PdV=-nRTln\frac{V_{2}}{V_{1}}$
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Topics: 486

486 Topics

1428 Posts

Last post Re: reversible and irreversib…
by Kristin Ishaya 1A View the latest post
Tue Mar 20, 2018 1:00 am
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
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Topics: 633

633 Topics

1747 Posts

Last post Re: Internal Energy of Isolat…
by DamianW View the latest post
Sun Mar 18, 2018 7:42 pm
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
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Topics: 706

706 Topics

1957 Posts

Last post Re: S and pressure
by Beza Ayalew 1I View the latest post
Sun Mar 18, 2018 9:27 pm
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: $S = k_{B} \ln W$
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Topics: 283

283 Topics

763 Posts

Last post Re: w
by Mishta Stanislaus 1H View the latest post
Sun Mar 18, 2018 8:24 pm
Entropy Changes Due to Changes in Volume and Temperature
Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$
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Topics: 564

564 Topics

1553 Posts

Last post Re: heat capacity
by Varsha Sivaganesh 1A View the latest post
Mon Mar 19, 2018 1:00 am
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
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Topics: 229

229 Topics

646 Posts

Last post Re: cis and trans molecules
by juchung7 View the latest post
Mon Mar 19, 2018 10:42 am
Gibbs Free Energy Concepts and Calculations
$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

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

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$
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Topics: 751

751 Topics

2052 Posts

Last post Re: equation involving enthal…
by Chem_Mod View the latest post
Tue Mar 20, 2018 9:24 am
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
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Topics: 49

49 Topics

178 Posts

Last post Re: Practice Test
by Jimmy Zhang Dis 1K View the latest post
Sun Mar 18, 2018 11:00 pm
Environment, Fossil Fuels, Alternative Fuels
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Topics: 11

11 Topics

33 Posts

Last post Re: fossil fuels on midterm
by Chem_Mod View the latest post
Sun Feb 11, 2018 7:06 pm
Biological Examples (*DNA Structural Transitions, etc.)
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Topics: 10

10 Topics

27 Posts

Last post Re: 9.69
by melissa carey 1f View the latest post
Sat Mar 17, 2018 9:43 am

Electrochemistry

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Balancing Redox Reactions
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Topics: 727

727 Topics

2263 Posts

Last post Re: Basic and Acidic conditio…
by Sophie W View the latest post
Sun May 27, 2018 11:01 am
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
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Topics: 1415

1415 Topics

3755 Posts

Last post Re: Difference in cell potent…
by Clara Rehmann 1K View the latest post
Tue Mar 20, 2018 9:34 am
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
Moderators: Chem_Mod, Chem_Admin
Topics: 290

290 Topics

853 Posts

Last post Re: n: negative or positive
by Kristin Ishaya 1A View the latest post
Tue Mar 20, 2018 1:11 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: 484

484 Topics

1327 Posts

Last post Re: Nernst Equation
by Varsha Sivaganesh 1A View the latest post
Mon Mar 19, 2018 1:02 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: 76

76 Topics

188 Posts

Last post Re: Electrolytic cells vs Gal…
by miznaakbar View the latest post
Sun Mar 18, 2018 2:04 pm

Chemical Kinetics

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Kinetics vs. Thermodynamics Controlling a Reaction
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Topics: 215

215 Topics

725 Posts

Last post Re: catalysts
by Clarisse Wikstrom 1H View the latest post
Tue Mar 20, 2018 10:28 pm
General Rate Laws
$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$
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Topics: 621

621 Topics

1911 Posts

Last post Re: Unique Reaction Rates
by Zack Barta 3I View the latest post
Sun Dec 02, 2018 8:39 pm
Method of Initial Rates (To Determine n and k)
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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
$\frac{d[R]}{dt}=-k; [R]=-kt + [R]_{0}; t_{\frac{1}{2}}=\frac{[R]_{0}}{2k}$
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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
$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$
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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: $\ln k = - \frac{E_{a}}{RT} + \ln A$
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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
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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
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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

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*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
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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
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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: 127

127 Topics

298 Posts

Last post Re: 4.29 Green book
by melissa carey 1f View the latest post
Wed Mar 14, 2018 11:43 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

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*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)
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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

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Posts

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*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

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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: 82

82 Topics

443 Posts

Last post Re: Sig Figs on Midterm
by Nghi Nguyen 1D View the latest post
Sat Dec 08, 2018 9:59 pm
Administrative Questions and Class Announcements
General non-science questions and class announcements.
Moderators: Chem_Mod, Chem_Admin
Topics: 414

414 Topics

2471 Posts

Last post Re: Final Grade View
by Claire Aseremo 1D View the latest post
Sun Dec 09, 2018 10:46 pm
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: 104

104 Topics

312 Posts

Last post Re: Test 3
by Marcela Udave Barrera 1A View the latest post
Mon Nov 26, 2018 5:01 pm

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