CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

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Ideal Gases
$PV=nRT$
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524 Topics

4670 Posts

Last post Re: Temperature
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:25 am
Equilibrium Constants & Calculating Concentrations
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Topics: 4079

4079 Topics

16681 Posts

Last post Re: Ignoring second deprotona…
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:35 am
Non-Equilibrium Conditions & The Reaction Quotient
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Topics: 623

623 Topics

3842 Posts

Last post Re: percent ionization
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:44 am
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
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1008 Topics

5382 Posts

Last post Re: 5J.5 D
by Kandyce Lance 3E View the latest post
Mon Mar 15, 2021 11:25 pm

Thermochemistry

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Phase Changes & Related Calculations
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Topics: 1407

1407 Topics

6865 Posts

Last post Re: Voltage difference
by kentbui1d View the latest post
Mon Mar 15, 2021 10:45 pm
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
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Topics: 2641

2641 Topics

9040 Posts

Last post Re: Enthalpy vs Entropy
by Phoebe Joseph View the latest post
Mon Mar 15, 2021 9:10 pm
Heat Capacities, Calorimeters & Calorimetry Calculations
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Topics: 1660

1660 Topics

6063 Posts

Last post Re: Bomb Calorimeter
by Diana Aguilar 3H View the latest post
Mon Mar 15, 2021 11:09 pm

Thermodynamics

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Thermodynamic Systems (Open, Closed, Isolated)
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732 Topics

4140 Posts

Last post Re: Thermochemistry during co…
by Sera Aintablian 2E View the latest post
Tue Mar 16, 2021 2:05 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: 554

554 Topics

2439 Posts

Last post Re: Ideal Gas law for q?
by Anthony_3C View the latest post
Tue Mar 16, 2021 12:16 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: 1099

1099 Topics

4357 Posts

Last post Re: irreversible vs reversibl…
by Constance Newell View the latest post
Mon Mar 15, 2021 9:40 pm
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
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Topics: 1271

1271 Topics

4677 Posts

Last post Re: Calorimeter
by Anastasia Yulo 1C View the latest post
Mon Mar 15, 2021 3:24 pm
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
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Topics: 1191

1191 Topics

3915 Posts

Last post Re: Entropy and Temperature
by Sera Aintablian 2E View the latest post
Tue Mar 16, 2021 1:46 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: 526

526 Topics

1664 Posts

Last post Re: Highest molar entropy (te…
by tholz11 View the latest post
Mon Mar 15, 2021 5:23 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: 1085

1085 Topics

3629 Posts

Last post Re: Kate's Midterm Review
by Chem_Mod View the latest post
Tue Mar 16, 2021 10:20 am
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
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Topics: 399

399 Topics

1486 Posts

Last post Re: Bond Enthalpies
by Valerie Doan 3I View the latest post
Mon Mar 15, 2021 10:24 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: 1497

1497 Topics

5581 Posts

Last post Re: G and Gnaught
by Kelly Yun 2I View the latest post
Tue Mar 16, 2021 5:54 am
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
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Topics: 196

196 Topics

1040 Posts

Last post Re: Celcius vs Kelvin for T1 …
by Diana Aguilar 3H View the latest post
Mon Mar 15, 2021 10:57 pm
Environment, Fossil Fuels, Alternative Fuels
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Topics: 16

16 Topics

74 Posts

Last post Re: Concept of "Cold"
by Edgar Velazquez 2K View the latest post
Sun Mar 14, 2021 11:51 pm
Biological Examples (*DNA Structural Transitions, etc.)
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Topics: 16

16 Topics

72 Posts

Last post Re: Heat Capacity
by Jacob Schwarz-Discussion 3I View the latest post
Sat Mar 13, 2021 11:27 pm

Electrochemistry

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Balancing Redox Reactions
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Topics: 1876

1876 Topics

8334 Posts

Last post Re: Sapling #5 (week 7/8)
by Michael Iter 2F View the latest post
Tue Mar 16, 2021 4:17 am
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
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Topics: 3242

3242 Topics

10825 Posts

Last post Re: Kate's Week 8 Workshop Wi…
by Chem_Mod View the latest post
Tue Mar 16, 2021 10:20 am
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
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Topics: 758

758 Topics

3406 Posts

Last post Re: Potential Differences
by Sera Aintablian 2E View the latest post
Tue Mar 16, 2021 2:10 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: 1154

1154 Topics

3894 Posts

Last post Re: Sapling #15 (Week 7/8)
by 705340227 View the latest post
Mon Mar 15, 2021 9:28 pm
Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
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Topics: 189

189 Topics

609 Posts

Last post Re: rust
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:59 am

Chemical Kinetics

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Kinetics vs. Thermodynamics Controlling a Reaction
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Topics: 377

377 Topics

2016 Posts

Last post Re: Plotting Reaction Rate
by Nico Medina View the latest post
Tue Mar 16, 2021 5:05 am
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: 1175

1175 Topics

4483 Posts

Last post Re: Increasing or decreasing …
by Keshav Patel 14B 2B View the latest post
Tue Mar 16, 2021 10:49 am
Method of Initial Rates (To Determine n and k)
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Topics: 447

447 Topics

1845 Posts

Last post Re: Week 9 and 10 Sapling #1
by Amanda Bueno-Kling View the latest post
Tue Mar 16, 2021 3:56 am
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: 242

242 Topics

1320 Posts

Last post Re: Sapling #6 (Week 9/10)
by Nan_Guan_1L View the latest post
Tue Mar 16, 2021 8:41 am
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: 522

522 Topics

2073 Posts

Last post Re: 7B.1
by Nico Medina View the latest post
Tue Mar 16, 2021 5:09 am
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: 269

269 Topics

1081 Posts

Last post Re: Half Life for Second Orde…
by Nico Medina View the latest post
Tue Mar 16, 2021 5:07 am
Reaction Mechanisms, Reaction Profiles
$K = \frac{k_{forward}}{k_{reverse}}$
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Topics: 1037

1037 Topics

3510 Posts

Last post Re: Pseudo Reaction Orders
by Faaizah Arshad 1H View the latest post
Tue Mar 16, 2021 8:59 am
Arrhenius Equation, Activation Energies, Catalysts
Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$
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Topics: 918

918 Topics

3203 Posts

Last post Re: Frequency factor and Acti…
by Chem_Mod View the latest post
Tue Mar 16, 2021 10:25 am
*Enzyme Kinetics
$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$
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Topics: 80

80 Topics

389 Posts

Last post Re: intermediates vs. catalys…
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:50 am
Experimental Details
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Topics: 41

41 Topics

168 Posts

Last post Re: textbook 7.17
by Andreas Krumbein 1L View the latest post
Sun Mar 14, 2021 7:44 am
Environment, Ozone, CFCs
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Topics: 9

9 Topics

59 Posts

Last post Re: catalysis vs intermediate
by Eve Gross-Sable 1B View the latest post
Sun Mar 14, 2021 12:53 pm
Biological Examples
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Topics: 20

20 Topics

88 Posts

Last post Re: atp exmaples
by Nico Medina View the latest post
Tue Mar 16, 2021 5:12 am

Forum

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Chem 14B Uploaded Files (Worksheets, etc.)
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No posts

*Thermodynamics and Kinetics of Organic Reactions

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*Electrophiles
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Topics: 137

137 Topics

432 Posts

Last post Re: Sapling Week 7/8: Questio…
by claire ikemiya_2I View the latest post
Sat Mar 13, 2021 10:16 pm
*Nucleophiles
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Topics: 136

136 Topics

383 Posts

Last post Re: FInal
by SamanthaTolentino 3D View the latest post
Fri Mar 12, 2021 1:39 am
*Organic Reaction Mechanisms in General
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Topics: 304

304 Topics

780 Posts

Last post Re: Textbook Problem 6.43
by Yun Su Choi 3G View the latest post
Fri Mar 12, 2021 10:31 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: 136

136 Topics

378 Posts

Last post Re: Activation Energy and Cat…
by Fiona Huang 3C View the latest post
Mon Mar 15, 2021 6:49 pm
*Complex Reaction Coordinate Diagrams
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Topics: 23

23 Topics

60 Posts

Last post Re: Enthalpy
by edward_brodell_2I View the latest post
Fri Mar 12, 2021 9:04 pm

*Names and Structures of Organic Molecules

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*Alkanes
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Topics: 586

586 Topics

1664 Posts

Last post Re: Final
by joshtully View the latest post
Sun Mar 07, 2021 7:42 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
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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
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Topics: 108

108 Topics

261 Posts

Last post Re: Functional Groups on Fina…
by joshtully View the latest post
Sun Mar 07, 2021 7:43 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
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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

155 Posts

Last post Re: Will the Final for 14B ha…
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:52 am

*Conformations of Organic Molecules

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*Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
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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

100 Posts

Last post Re: Steric Strain
by 305614361 View the latest post
Mon Mar 15, 2021 12:51 pm
*Cyclopentanes
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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

74 Posts

Last post Re: Vocabulary
by Matlynn Giles 2E View the latest post
Sun Feb 14, 2021 11:55 pm
*ChemDraw
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Topics: 17

17 Topics

44 Posts

Last post Re: draw
by Naomi Hernandez-Ramirez 1J View the latest post
Tue Mar 16, 2021 8:48 am
*Chem3D
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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.
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Topics: 445

445 Topics

6551 Posts

Last post Re: Note Taking
by 005137088 View the latest post
Tue Mar 16, 2021 4:40 am
Administrative Questions and Class Announcements
General non-science questions and class announcements.
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Topics: 1077

1077 Topics

8340 Posts

Last post Re: THANK YOU DR LAVELLE!
by Chem_Mod View the latest post
Tue Mar 16, 2021 7:02 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).
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Topics: 264

264 Topics

1713 Posts

Last post Re: Final thoughts
by Megan Chan 3A View the latest post
Mon Mar 15, 2021 11:47 am

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