CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

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Ideal Gases
$PV=nRT$
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Topics: 417

417 Topics

2747 Posts

Last post Re: Conjugate acid and bases
by Jesalynne 2F View the latest post
Sun Feb 23, 2020 9:19 pm
Equilibrium Constants & Calculating Concentrations
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Topics: 2773

2773 Topics

9774 Posts

Last post Re: Ph
by RobertXu_2J View the latest post
Sun Feb 23, 2020 9:49 pm
Non-Equilibrium Conditions & The Reaction Quotient
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Topics: 447

447 Topics

2251 Posts

Last post Re: Test #1 Problem #2
by CalvinTNguyen2D View the latest post
Sun Feb 23, 2020 11:39 pm
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
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Topics: 692

692 Topics

3187 Posts

Last post Re: Adding Inert Gas
by CalvinTNguyen2D View the latest post
Sun Feb 23, 2020 11:37 pm

Thermochemistry

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Phase Changes & Related Calculations
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Topics: 1242

1242 Topics

5131 Posts

Last post Re: Van't Hoff Eq
by Jaklin Astvatsatryan View the latest post
Sun Feb 23, 2020 9:40 pm
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
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Topics: 2262

2262 Topics

7158 Posts

Last post Re: midterm Q6A
by Pegah Nasseri 1K View the latest post
Fri Feb 21, 2020 7:12 pm
Heat Capacities, Calorimeters & Calorimetry Calculations
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Topics: 1286

1286 Topics

4221 Posts

Last post Re: What the calorimeter allo…
by Ariel Davydov 1C View the latest post
Sat Feb 22, 2020 7:46 pm

Thermodynamics

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Thermodynamic Systems (Open, Closed, Isolated)
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Topics: 567

567 Topics

2588 Posts

Last post Re: Kelvin or Celsius?
by Jesse Anderson-Ramirez 3I View the latest post
Sun Feb 23, 2020 11:28 pm
Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
isochoric/isometric: $\Delta V = 0$
isothermal: $\Delta T = 0$
isobaric: $\Delta P = 0$
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Topics: 439

439 Topics

1671 Posts

Last post Re: U vs H
by Leyna Dang 2H View the latest post
Sun Feb 23, 2020 11:37 pm
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: 849

849 Topics

2909 Posts

Last post Re: Irreversible and Reversib…
by lauraxie2e View the latest post
Mon Feb 24, 2020 10:44 am
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
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Topics: 1001

1001 Topics

3226 Posts

Last post Re: Negative work
by Elizabeth Harty 1A View the latest post
Mon Feb 24, 2020 11:23 am
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
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Topics: 952

952 Topics

2827 Posts

Last post Re: 4.45
by Brian Tangsombatvisit 1C View the latest post
Mon Feb 24, 2020 5:15 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: 438

438 Topics

1295 Posts

Last post Re: cis and trans entropy
by anjali41 View the latest post
Mon Feb 24, 2020 4:31 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: 878

878 Topics

2699 Posts

Last post Re: S = 0
by Sanjana K - 2F View the latest post
Mon Feb 24, 2020 12:51 am
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
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Topics: 321

321 Topics

1086 Posts

Last post Re: Spontaneous
by Hussain Chharawalla 1G View the latest post
Sun Feb 23, 2020 3:08 pm
Gibbs Free Energy Concepts and Calculations
$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

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

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$
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Topics: 1201

1201 Topics

3967 Posts

Last post 5G.17
by Jielena_Bragasin2G View the latest post
Tue Feb 25, 2020 7:43 am
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
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Topics: 147

147 Topics

630 Posts

Last post Re: Converting K back to Kc
by 405268063 View the latest post
Tue Feb 25, 2020 12:49 am
Environment, Fossil Fuels, Alternative Fuels
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Topics: 14

14 Topics

56 Posts

Last post Re: Why ethanol?
by Jasleen Kahlon View the latest post
Sun Feb 23, 2020 10:53 pm
Biological Examples (*DNA Structural Transitions, etc.)
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Topics: 14

14 Topics

45 Posts

Last post Re: Examples Expected to Know
by Caroline Beecher 2H View the latest post
Fri Feb 21, 2020 3:39 pm

Electrochemistry

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Balancing Redox Reactions
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Topics: 1233

1233 Topics

4551 Posts

Last post 6K.1
by Tracy Tolentino_2E View the latest post
Tue Feb 25, 2020 1:20 am
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
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Topics: 2165

2165 Topics

6385 Posts

Last post Writing Cell diagram
by Junwei Sun 4I View the latest post
Tue Feb 25, 2020 1:59 am
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
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Topics: 533

533 Topics

1900 Posts

Last post Gibbs free energy and 6L.1
by Tracy Tolentino_2E View the latest post
Tue Feb 25, 2020 1:13 am
Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$
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Topics: 733

733 Topics

2159 Posts

Last post Re: electrolysis
by Angus Wu_4G View the latest post
Tue Feb 25, 2020 1:06 am
Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
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Topics: 102

102 Topics

272 Posts

Last post Re: Charging
by Angus Wu_4G View the latest post
Tue Feb 25, 2020 1:12 am

Chemical Kinetics

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Kinetics vs. Thermodynamics Controlling a Reaction
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Topics: 281

281 Topics

1076 Posts

Last post Re: Study Advice
by ELu 1J View the latest post
Tue Feb 18, 2020 10:06 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: 842

842 Topics

2668 Posts

Last post Re: Unique Reaction Rates
by AnayaArnold_3L View the latest post
Mon Nov 11, 2019 7:31 pm
Method of Initial Rates (To Determine n and k)
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Topics: 319

319 Topics

1038 Posts

Last post Re: Week 9 Worksheet (2E,I,K)
by Maayan Epstein 14B View the latest post
Sun Mar 17, 2019 10:15 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: 167

167 Topics

715 Posts

Last post Re: Deriving Equations
by SydBenedict2H View the latest post
Sun Mar 17, 2019 10:49 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: 381

381 Topics

1297 Posts

Last post Re: Slopes of a plot
by Douglas Nguyen 2J View the latest post
Sun Mar 17, 2019 10:58 pm
Second Order Reactions
$\frac{d[R]}{dt}=-k[R]^{2}; \frac{1}{[R]}=kt + \frac{1}{[R]_{0}}; t_{\frac{1}{2}}=\frac{1}{k[R]_{0}}$
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Topics: 221

221 Topics

746 Posts

Last post Re: Half Life
by Anmol_cheema_2F View the latest post
Sun Mar 17, 2019 5:17 pm
Reaction Mechanisms, Reaction Profiles
$K = \frac{k_{forward}}{k_{reverse}}$
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Topics: 746

746 Topics

2229 Posts

Last post Re: HW problem
by aaronharouni View the latest post
Mon Mar 18, 2019 12:23 pm
Arrhenius Equation, Activation Energies, Catalysts
Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$
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Topics: 609

609 Topics

1805 Posts

Last post Re: Enzyme
by Rosha Mamita 2H View the latest post
Mon Mar 18, 2019 10:35 pm
*Enzyme Kinetics
$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$
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Topics: 55

55 Topics

223 Posts

Last post Re: How do you tell if someth…
by 505211599 View the latest post
Sun Mar 17, 2019 11:58 pm
Experimental Details
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Topics: 31

31 Topics

105 Posts

Last post Re: Psuedo First Order
by Douglas Nguyen 2J View the latest post
Sun Mar 17, 2019 11:01 pm
Environment, Ozone, CFCs
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Topics: 4

4 Topics

10 Posts

Last post Re: Homogeneous Catalysts and…
by Angel Chen 2k View the latest post
Fri Mar 15, 2019 4:51 pm
Biological Examples
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Topics: 12

12 Topics

38 Posts

Last post Re: ATP example
by MariahClark 2F View the latest post
Sun Mar 17, 2019 7:28 pm

*Thermodynamics and Kinetics of Organic Reactions

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*Electrophiles
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Topics: 135

135 Topics

401 Posts

Last post Re: final
by Rogelio Bazan 1D View the latest post
Mon Mar 11, 2019 3:30 pm
*Nucleophiles
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Topics: 135

135 Topics

371 Posts

Last post Re: SN2 Reactions
by 604807557 View the latest post
Sun Mar 18, 2018 10:33 pm
*Organic Reaction Mechanisms in General
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Topics: 299

299 Topics

732 Posts

Last post Re: Biological Examples
by Vincent Leong 2B View the latest post
Sat Feb 08, 2020 10:28 pm
*Electrophilic Addition
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Topics: 102

102 Topics

251 Posts

Last post Re: nucleophile and electroph…
by Hadji Yono-Cruz 2L View the latest post
Sat Mar 16, 2019 6:58 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 11:39 am
*Free Energy of Activation vs Activation Energy
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Topics: 131

131 Topics

314 Posts

Last post Re: Spontaneous reactions
by Jacob Villar 2C View the latest post
Sun Jan 26, 2020 10:51 pm
*Complex Reaction Coordinate Diagrams
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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
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Topics: 585

585 Topics

1656 Posts

Last post Re: Final
by 804994652 View the latest post
Sun Mar 17, 2019 9:25 am
*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 9:34 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 10:18 pm
*Cycloalkenes
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Topics: 150

150 Topics

410 Posts

Last post Re: Where to start counting W…
by 104469125 View the latest post
Sun Mar 19, 2017 6:43 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
Mon Mar 20, 2017 12:54 am
*Haloalkanes
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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 11:19 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 2:14 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 8:50 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 9:44 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 8:15 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 10:46 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 5:02 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 1:36 pm
*Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
Moderators: Chem_Mod, Chem_Admin
Topics: 62

62 Topics

145 Posts

Last post Re: Triprotic Acid
by Chem_Mod View the latest post
Sun Mar 17, 2019 3:10 pm

*Conformations of Organic Molecules

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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 10:54 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 1:34 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
Sun Mar 19, 2017 12:11 am
*Cyclohexanes (Chair, Boat, Geometric Isomers)
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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 5:28 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 10:58 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 9:21 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 11:56 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: 180

180 Topics

1161 Posts

Last post Re: 2/24 lecture
by Kallista McCarty 1C View the latest post
Mon Feb 24, 2020 6:58 pm
Administrative Questions and Class Announcements
General non-science questions and class announcements.
Moderators: Chem_Mod, Chem_Admin
Topics: 632

632 Topics

4073 Posts

Last post Re: midterm solutions
by chrisleung-2J View the latest post
Tue Feb 25, 2020 1:08 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: 174

174 Topics

684 Posts

Last post Re: Organic Chemistry Tutor?
by 105311039 View the latest post
Sun Feb 23, 2020 5:46 pm

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