CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

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Ideal Gases
$PV=nRT$
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Topics: 425

425 Topics

2863 Posts

Last post Re: Reading the textbook
by Joshua Eidam 3D View the latest post
Mon Oct 19, 2020 12:02 am
Equilibrium Constants & Calculating Concentrations
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Topics: 2816

2816 Topics

9980 Posts

Last post Re: Solving for the equilibri…
by Gurmukhi Bevli 4G View the latest post
Wed Mar 18, 2020 1:09 am
Non-Equilibrium Conditions & The Reaction Quotient
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Topics: 457

457 Topics

2323 Posts

Last post Re: Qc vs Kc
by Gurmukhi Bevli 4G View the latest post
Wed Mar 18, 2020 1:20 am
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
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Topics: 709

709 Topics

3268 Posts

Last post Re: pH of acids
by SVajragiri_1C View the latest post
Tue Mar 17, 2020 8:38 pm

Thermochemistry

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Phase Changes & Related Calculations
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Topics: 1249

1249 Topics

5192 Posts

Last post Re: standard reaction enthalp…
by ursulavictorino1K View the latest post
Tue Mar 17, 2020 12:49 am
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
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Topics: 2280

2280 Topics

7244 Posts

Last post Re: Final Exam #15
by Ayushi2011 View the latest post
Mon Mar 16, 2020 6:12 pm
Heat Capacities, Calorimeters & Calorimetry Calculations
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Topics: 1296

1296 Topics

4278 Posts

Last post Re: specific vs molar
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 5:55 am

Thermodynamics

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Thermodynamic Systems (Open, Closed, Isolated)
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Topics: 572

572 Topics

2653 Posts

Last post Re: Kelvin or Celsius?
by Bella Townsend View the latest post
Tue Mar 17, 2020 10:19 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: 446

446 Topics

1711 Posts

Last post Re: isochoric
by SVajragiri_1C View the latest post
Sun Mar 15, 2020 10:39 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: 856

856 Topics

2963 Posts

Last post Re: Ideal gas
by BAlvarado_1L View the latest post
Tue Mar 17, 2020 12:15 pm
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
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Topics: 1011

1011 Topics

3289 Posts

Last post Re: ΔU Equal 0
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 10:34 pm
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
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Topics: 963

963 Topics

2886 Posts

Last post Re: holding pressure/volume c…
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 4:00 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: $S = k_{B} \ln W$
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Topics: 449

449 Topics

1341 Posts

Last post Re: Understanding Entropy
by Riya Sood 4G View the latest post
Tue Mar 17, 2020 11:11 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: 888

888 Topics

2743 Posts

Last post Re: Difference in volume and …
by andrewcj 2C View the latest post
Sun Mar 15, 2020 11:44 pm
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
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Topics: 325

325 Topics

1104 Posts

Last post Re: enthalpy constants?
by andrewcj 2C View the latest post
Sun Mar 15, 2020 11:40 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: 1279

1279 Topics

4270 Posts

Last post Re: Delta G of ionization
by Tahlia Mullins View the latest post
Wed Mar 18, 2020 12:15 am
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
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Topics: 172

172 Topics

766 Posts

Last post Re: Entropy
by Ayushi2011 View the latest post
Mon Mar 16, 2020 6:09 pm
Environment, Fossil Fuels, Alternative Fuels
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Topics: 15

15 Topics

59 Posts

Last post Re: Environment and Fossil Fu…
by Leonardo Le Merle 1D View the latest post
Thu Mar 12, 2020 11:23 am
Biological Examples (*DNA Structural Transitions, etc.)
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Topics: 15

15 Topics

57 Posts

Last post Re: Examples Expected to Know
by Elizabeth Harty 1A View the latest post
Sun Mar 15, 2020 12:51 pm

Electrochemistry

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Balancing Redox Reactions
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Topics: 1434

1434 Topics

5728 Posts

Last post Re: Cathode and Anode
by briannam_1F View the latest post
Tue Mar 17, 2020 9:35 pm
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
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Topics: 2675

2675 Topics

8374 Posts

Last post Re: Water and voltage
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 11:33 pm
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
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Topics: 654

654 Topics

2609 Posts

Last post Re: Endgame 5d
by Nick Fiorentino 1E View the latest post
Tue Mar 17, 2020 8:09 pm
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: 973

973 Topics

3101 Posts

Last post Re: Concentration Cells
by Jessica Chen 2C View the latest post
Tue Mar 17, 2020 11:38 pm
Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
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Topics: 153

153 Topics

456 Posts

Last post Re: Ion Selective Electrode
by Riya Sood 4G View the latest post
Tue Mar 17, 2020 10:31 pm

Chemical Kinetics

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Kinetics vs. Thermodynamics Controlling a Reaction
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Topics: 335

335 Topics

1501 Posts

Last post Re: Kinetics
by Bella Townsend View the latest post
Tue Mar 17, 2020 9:37 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: 1038

1038 Topics

3537 Posts

Last post Re: rate in an uncontrolled s…
by Bella Townsend View the latest post
Tue Mar 17, 2020 10:01 pm
Method of Initial Rates (To Determine n and k)
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Topics: 394

394 Topics

1443 Posts

Last post Re: comparison
by Bella Townsend View the latest post
Tue Mar 17, 2020 9:53 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: 214

214 Topics

994 Posts

Last post Re: Rate
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 9:49 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: 461

461 Topics

1664 Posts

Last post Re: molecularity
by Tauhid Islam- 1H View the latest post
Tue Mar 17, 2020 11:02 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: 248

248 Topics

931 Posts

Last post Re: 2nd order
by Ayushi2011 View the latest post
Mon Mar 16, 2020 6:04 pm
Reaction Mechanisms, Reaction Profiles
$K = \frac{k_{forward}}{k_{reverse}}$
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Topics: 915

915 Topics

2860 Posts

Last post Re: Mechanisms
by Riya Sood 4G View the latest post
Tue Mar 17, 2020 10:28 pm
Arrhenius Equation, Activation Energies, Catalysts
Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$
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Topics: 776

776 Topics

2534 Posts

Last post Re: Arrhenius Equation
by DLee_1L View the latest post
Wed Mar 18, 2020 12:22 am
*Enzyme Kinetics
$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$
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Topics: 69

69 Topics

304 Posts

Last post Re: catalyst
by Jeremy_Guiman2E View the latest post
Wed Mar 18, 2020 12:31 am
Experimental Details
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Topics: 34

34 Topics

136 Posts

Last post Re: Psuedo First Order
by Noe BM 1J View the latest post
Sun Mar 15, 2020 4:42 pm
Environment, Ozone, CFCs
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Topics: 8

8 Topics

33 Posts

Last post Re: final thoughts
by Sjeffrey_1C View the latest post
Sat Mar 14, 2020 12:02 pm
Biological Examples
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Topics: 17

17 Topics

72 Posts

Last post Re: iN relation to ATP
by Daniel Yu 1E View the latest post
Sun Mar 15, 2020 11:42 pm

*Thermodynamics and Kinetics of Organic Reactions

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*Electrophiles
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Topics: 135

135 Topics

405 Posts

Last post Re: final
by Jessa Maheras 4F View the latest post
Sun Mar 15, 2020 6:46 am
*Nucleophiles
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Topics: 136

136 Topics

378 Posts

Last post Re: FInal
by VLi_2B View the latest post
Sat Mar 14, 2020 7:04 pm
*Organic Reaction Mechanisms in General
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Topics: 300

300 Topics

741 Posts

Last post Re: 7B.17
by KSong_1J View the latest post
Fri Mar 13, 2020 8:25 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: 133

133 Topics

331 Posts

Last post Re: Temperature vs. activatio…
by Charlene Datu 2E View the latest post
Mon Mar 16, 2020 7:16 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: 586

586 Topics

1660 Posts

Last post Re: Alkaline environment
by Alan Cornejo 1a View the latest post
Tue Mar 17, 2020 5:06 pm
*Cycloalkanes
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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
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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
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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: 28

28 Topics

75 Posts

Last post Re: Friction
by Chem_Mod View the latest post
Tue Mar 17, 2020 4:27 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
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Topics: 61

61 Topics

158 Posts

Last post Re: Nucleophile
by 804899546 View the latest post
Thu Mar 15, 2018 9:44 pm
*Aldehydes
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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
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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
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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
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Topics: 63

63 Topics

154 Posts

Last post Re: Will the Final for 14B ha…
by AGaeta_2C View the latest post
Sun Mar 15, 2020 7:34 am

*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
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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
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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

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Student Social/Study Group
This forum topic is for students to self-organize study groups, etc.
Moderators: Chem_Mod, Chem_Admin
Topics: 211

211 Topics

1404 Posts

Last post Re: studying for exams
by Chelsea_Guzman_1B View the latest post
Thu Oct 22, 2020 2:36 pm
Administrative Questions and Class Announcements
General non-science questions and class announcements.
Moderators: Chem_Mod, Chem_Admin
Topics: 749

749 Topics

5100 Posts

Last post Re: Constants in the tests
by Colin Squire 3C View the latest post
Sat Oct 24, 2020 9:32 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: 199

199 Topics

887 Posts

Last post Re: Enthalpy
by Victor Qiu View the latest post
Mon Oct 05, 2020 8:34 am

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