CHEMISTRY COMMUNITY - Chem 14B

Chem 14B

Chemical Equilibrium

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Ideal Gases
$PV=nRT$
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1033 Topics

8473 Posts

Last post Re: Advice on how to navigate…
by 505954613 View the latest post
Fri Oct 04, 2024 6:20 pm
Equilibrium Constants & Calculating Concentrations
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8904 Topics

34676 Posts

Last post Re: When do I use Ka or Pka?
by 105561735 View the latest post
Mon Mar 18, 2024 10:19 am
Non-Equilibrium Conditions & The Reaction Quotient
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1367 Topics

7766 Posts

Last post Re: acidic vs basic salts str…
by ivy knabe 3i View the latest post
Sun Mar 17, 2024 11:34 pm
Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
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2322 Topics

10983 Posts

Last post Re: Titrations
by 205873468 View the latest post
Mon Mar 18, 2024 11:36 am

Thermochemistry

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Phase Changes & Related Calculations
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2458 Topics

12425 Posts

Last post Re: pH
by raina_bandekar_1G View the latest post
Mon Mar 18, 2024 11:52 pm
Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
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4355 Topics

15169 Posts

Last post Re: Why is the reactant in en…
by sihupark View the latest post
Tue Oct 15, 2024 2:50 pm
Heat Capacities, Calorimeters & Calorimetry Calculations
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2957 Topics

10832 Posts

Last post Re: Accounting for Surroundin…
by 305920501 View the latest post
Mon Mar 18, 2024 2:33 am

Thermodynamics

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Thermodynamic Systems (Open, Closed, Isolated)
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1427 Topics

7861 Posts

Last post Re: Classifying Thermodynamic…
by JadaArreola_2E View the latest post
Mon Mar 18, 2024 1:01 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: 983

983 Topics

4136 Posts

Last post Re: Isothermal processes
by Anya 1G View the latest post
Mon Mar 18, 2024 1:08 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: 2005

2005 Topics

7688 Posts

Last post Re: finding work with minimal…
by Isaac 14B View the latest post
Sun Mar 17, 2024 11:33 pm
Concepts & Calculations Using First Law of Thermodynamics
$\Delta U=q+w$
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2241 Topics

8308 Posts

Last post Re: Energy Contribution
by Brian Huynh 2L View the latest post
Mon Mar 18, 2024 9:06 am
Concepts & Calculations Using Second Law of Thermodynamics
$\Delta S = \frac{q_{rev}}{T}$
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Topics: 2153

2153 Topics

7077 Posts

Last post Re: Finding EntropY Using Exp…
by Brandon Li View the latest post
Sun Mar 17, 2024 9:17 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: 927

927 Topics

2895 Posts

Last post Re: Molar Entropy
by 205873468 View the latest post
Mon Mar 18, 2024 11:59 am
Entropy Changes Due to Changes in Volume and Temperature
Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$
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Topics: 1930

1930 Topics

6304 Posts

Last post Re: HW 5-6: Question 8
by Mackenzie Lay 2H View the latest post
Mon Mar 18, 2024 11:24 pm
Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
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Topics: 758

758 Topics

2843 Posts

Last post Re: Molar Entropy
by Mackenzie Lay 2H View the latest post
Mon Mar 18, 2024 11:09 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: 2623

2623 Topics

9758 Posts

Last post Re: Calculate equilibrium con…
by Mackenzie Lay 2H View the latest post
Mon Mar 18, 2024 11:05 pm
Van't Hoff Equation
$\ln K = -\frac{\Delta H^{\circ}}{RT} + \frac{\Delta S^{\circ}}{R}$
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Topics: 343

343 Topics

1665 Posts

Last post Re: Van't Hoff Equations
by 705903057 View the latest post
Mon Mar 18, 2024 11:57 am
Environment, Fossil Fuels, Alternative Fuels
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Topics: 27

27 Topics

139 Posts

Last post Re: Electrolysis Equations
by Sarah Egan 3A View the latest post
Sat Mar 16, 2024 11:39 pm
Biological Examples (*DNA Structural Transitions, etc.)
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Topics: 38

38 Topics

152 Posts

Last post Re: Thermodynamics and ATP hy…
by Anastasia_3B View the latest post
Wed Feb 28, 2024 10:09 am

Electrochemistry

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Balancing Redox Reactions
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Topics: 3977

3977 Topics

16446 Posts

Last post Re: redox reactions and biolo…
by Carrie Hester 2H View the latest post
Mon Mar 18, 2024 8:57 pm
Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
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Topics: 5531

5531 Topics

18201 Posts

Last post Re: Electromotive force
by duketh10 View the latest post
Mon Mar 18, 2024 11:41 pm
Work, Gibbs Free Energy, Cell (Redox) Potentials
$\Delta G^{\circ} = -nFE_{cell}^{\circ}$
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Topics: 1353

1353 Topics

6192 Posts

Last post Re: Temperature on Gibbs Free…
by duketh10 View the latest post
Mon Mar 18, 2024 11:24 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: 2023

2023 Topics

7071 Posts

Last post Re: Nernst Equation
by duketh10 View the latest post
Mon Mar 18, 2024 11:29 pm
Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
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Topics: 399

399 Topics

1267 Posts

Last post Re: metal plating
by Hannah Mann 2K View the latest post
Mon Mar 18, 2024 12:53 pm

Chemical Kinetics

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Kinetics vs. Thermodynamics Controlling a Reaction
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Topics: 787

787 Topics

4360 Posts

Last post Re: Kinetics
by Mackenzie Lay 2H View the latest post
Mon Mar 18, 2024 11:33 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: 2147

2147 Topics

8808 Posts

Last post Re: Why is there a d in front…
by grace thomas 1D View the latest post
Mon Mar 18, 2024 10:45 am
Method of Initial Rates (To Determine n and k)
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Topics: 766

766 Topics

3474 Posts

Last post Re: initial rate
by raina_bandekar_1G View the latest post
Mon Mar 18, 2024 11:53 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: 507

507 Topics

2953 Posts

Last post Re: Rate law
by duketh10 View the latest post
Tue Mar 19, 2024 12:02 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: 893

893 Topics

3906 Posts

Last post Re: 7B.1 Textbook Problem
by Nicholas_Fink_3A View the latest post
Mon Mar 18, 2024 10:27 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: 502

502 Topics

2238 Posts

Last post Re: Linearity
by 205873468 View the latest post
Mon Mar 18, 2024 11:50 am
Reaction Mechanisms, Reaction Profiles
$K = \frac{k_{forward}}{k_{reverse}}$
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Topics: 1795

1795 Topics

6649 Posts

Last post Re: Rate Law
by raina_bandekar_1G View the latest post
Mon Mar 18, 2024 11:59 pm
Arrhenius Equation, Activation Energies, Catalysts
Arrhenius Equation: $\ln k = - \frac{E_{a}}{RT} + \ln A$
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Topics: 1801

1801 Topics

6928 Posts

Last post Re: Catalyst
by raina_bandekar_1G View the latest post
Mon Mar 18, 2024 11:55 pm
*Enzyme Kinetics
$V_{0} = \frac{V_{max}[S]}{K_{M} + [S]}; K_{M} = \frac{[E][S]}{[ES]}$
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Topics: 174

174 Topics

940 Posts

Last post Re: Homework 9/10 #18
by 705903057 View the latest post
Mon Mar 18, 2024 10:47 am
Experimental Details
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Topics: 69

69 Topics

287 Posts

Last post Re: Pre Equilibrium Method
by Jolene Robles 2H View the latest post
Sun Mar 17, 2024 11:48 pm
Environment, Ozone, CFCs
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Topics: 10

10 Topics

89 Posts

Last post Re: Uncatalyzed vs catalyzed
by Hamna_Khan_2E View the latest post
Sat Mar 18, 2023 11:34 pm
Biological Examples
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Topics: 40

40 Topics

188 Posts

Last post Re: Catalyst Differences
by Isabelle Huerta 2I View the latest post
Mon Mar 18, 2024 2:52 am

Forum

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Chem 14B Uploaded Files (Worksheets, etc.)
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343 Topics

1000 Posts

Last post Re: Ashley Rescheduling Monda…
by Chem_Mod View the latest post
Tue Nov 19, 2024 7:01 am
Student Social/Study Group
This forum topic is for students to self-organize study groups, etc.
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564 Topics

7903 Posts

Last post Re: 14B in Spring
by Chem_Mod View the latest post
Tue Nov 12, 2024 3:59 pm
Administrative Questions and Class Announcements
General non-science questions and class announcements.
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1657 Topics

10529 Posts

Last post Re: Question Relating to the …
by Chem_Mod View the latest post
Sun Dec 01, 2024 7:38 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: 418

418 Topics

2495 Posts

Last post Re: Dot in a chemical equation
by Arianna Zhou 1D View the latest post
Sun Mar 17, 2024 9:02 pm

*Thermodynamics and Kinetics of Organic Reactions

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*Electrophiles
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Topics: 142

142 Topics

483 Posts

Last post Re: Determining if a molecule…
by marcelnajjar View the latest post
Wed Mar 13, 2024 12:34 pm
*Nucleophiles
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136 Topics

389 Posts

Last post Re: What is a nucleophile?
by 705748759 View the latest post
Sun Mar 19, 2023 11:16 pm
*Organic Reaction Mechanisms in General
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311 Topics

812 Posts

Last post Re: Rate Law when Intermediat…
by 205975909 View the latest post
Fri Mar 15, 2024 12:21 am
*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

108 Posts

Last post Re: Electron flow arrows
by Leilani Mareko-1F View the latest post
Sat Mar 18, 2023 3:03 am
*Free Energy of Activation vs Activation Energy
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Topics: 146

146 Topics

461 Posts

Last post Re: Catalysis
by Janelle2E View the latest post
Mon Mar 18, 2024 1:00 am
*Complex Reaction Coordinate Diagrams
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23 Topics

65 Posts

Last post Re: Electrophilic Addition Re…
by 705748759 View the latest post
Sun Mar 19, 2023 11:10 pm

*Names and Structures of Organic Molecules

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*Alkanes
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Topics: 587

587 Topics

1678 Posts

Last post Re: Numbering
by 405718358 View the latest post
Mon Mar 20, 2023 10:44 am
*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

109 Posts

Last post Re: Naming
by parisnortega1 View the latest post
Wed Mar 15, 2023 12:43 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

262 Posts

Last post Re: Functional groups
by Tania Peymany 1A View the latest post
Wed Sep 29, 2021 5:35 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

64 Posts

Last post Re: Carbonyl -> Aldehydes and…
by rayirfan View the latest post
Mon Mar 13, 2023 12:11 am
*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

46 Posts

Last post Re: Functional Groups
by parisnortega1 View the latest post
Wed Mar 15, 2023 12:47 pm
*Amines
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Topics: 50

50 Topics

129 Posts

Last post Re: Charges on Amines
by parisnortega1 View the latest post
Wed Mar 15, 2023 12:46 pm
*Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
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Topics: 64

64 Topics

157 Posts

Last post Re: Midterm Format
by Katelyn Mak 2C View the latest post
Tue Nov 05, 2024 11:37 pm

*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

76 Posts

Last post Re: C-H Bond +4 kJ/mol
by marcelnajjar View the latest post
Wed Mar 13, 2024 12:42 pm
*ChemDraw
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Topics: 17

17 Topics

45 Posts

Last post Re: draw
by andrea tarelo 3e View the latest post
Wed Mar 09, 2022 9:24 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

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