## Search found 76 matches

Sun Mar 10, 2019 8:56 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Formulas
Replies: 6
Views: 257

### Re: Formulas

I think its just depends on what is given and known.
Sun Mar 10, 2019 8:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Approximation
Replies: 7
Views: 303

### Re: Approximation

yeah i have the same question, if we dont round will it be considered wrong?
Sun Mar 10, 2019 8:51 pm
Forum: Second Order Reactions
Topic: Equations
Replies: 2
Views: 1574

### Re: Equations

Just the final forms and what they are used for.
Sun Mar 10, 2019 8:50 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Instantaneous vs Average
Replies: 11
Views: 426

### Re: Instantaneous vs Average

Average rate is the change over time while the instantaneous rate is the rate at a specific moment found when taking the derivative.
Sun Mar 10, 2019 8:49 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Final Material
Replies: 4
Views: 163

### Re: Final Material

Do you know what homework questions were the ones he put on the exam?
Sun Mar 03, 2019 3:43 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free Energy and Entropy
Replies: 6
Views: 511

### Re: Gibbs Free Energy and Entropy

No in that case its dependent on the Temp, enthalpy and entropy so it can be + or -.
Sun Mar 03, 2019 3:41 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Large K value
Replies: 5
Views: 243

### Re: Large K value

It means that it is strongly favorable.
Sun Mar 03, 2019 3:40 pm
Forum: Zero Order Reactions
Topic: Units of k in Zero Order Reactions
Replies: 4
Views: 181

### Re: Units of k in Zero Order Reactions

I believe its M/S
Sun Mar 03, 2019 3:39 pm
Forum: Method of Initial Rates (To Determine n and k)
Topic: Determine n
Replies: 3
Views: 180

### Re: Determine n

Yeah you have to be a bit more specific as to which one you are talking about.
Sat Feb 23, 2019 9:04 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Homework
Replies: 3
Views: 143

### Re: Homework

Always even when there are tests.
Sat Feb 23, 2019 9:03 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Gibbs Free Energy and Pressure and K
Replies: 2
Views: 118

### Re: Gibbs Free Energy and Pressure and K

Yeah same i dont think that has really been discussed in lecture yet.
Sat Feb 23, 2019 9:02 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Test 3
Replies: 14
Views: 478

### Re: Test 3

Do you guys know what sections of the homework to focus on for this exam?
Sat Feb 23, 2019 8:44 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: test 3
Replies: 10
Views: 399

### Re: test 3

By any chance do you guys know what sections of the homework does Exam 2 include?
Sun Feb 17, 2019 4:52 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work done vs work on system
Replies: 18
Views: 1462

### Re: Work done vs work on system

"on" the system its positive and "by" the system its negative
Sun Feb 17, 2019 4:50 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: constant C
Replies: 7
Views: 431

### Re: constant C

C is the specific heat and it can be calculated to find the specific heat of pressure or volume
Sun Feb 17, 2019 4:49 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs and Enthalpy
Replies: 4
Views: 201

### Re: Gibbs and Enthalpy

Gibbs free energy is energy that can be used as work
Sun Feb 17, 2019 4:46 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Replies: 35
Views: 1225

Usually its given after class not in discussion section.
Sun Feb 10, 2019 10:42 am
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Negative q
Replies: 7
Views: 795

### Re: Negative q

it means its exothermic and heat is being released from the reaction
Sun Feb 10, 2019 10:41 am
Forum: Calculating Work of Expansion
Topic: Gas Constant
Replies: 3
Views: 160

### Re: Gas Constant

from the examples i have seen done they usually use that one so i dont think they will switch it up on us.
Sun Feb 10, 2019 10:38 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Midterm [ENDORSED]
Replies: 49
Views: 2131

### Re: Midterm[ENDORSED]

Do you guys know if the TAs or UAs are going to have some type of midterm review.
Sun Feb 10, 2019 10:36 am
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Equations
Replies: 5
Views: 299

### Re: Equations

Yeah thats the same problem i have, Im not sure where to use what because some are so closely related.
Sun Feb 03, 2019 1:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Registering/Creating Your Chemistry Community Account
Replies: 25
Views: 44442

### Re: Registering/Creating Your Chemistry Community Account

Sun Feb 03, 2019 1:25 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: S and pressure
Replies: 3
Views: 437

### Re: S and pressure

it should increase, +.
Sun Feb 03, 2019 1:23 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Replies: 4
Views: 189

also heat is not allowed to enter or leave the system
Sun Feb 03, 2019 1:19 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: kJ vs J
Replies: 9
Views: 231

### Re: kJ vs J

1 kj = 1000j but you can use which ever
Sun Feb 03, 2019 1:16 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Specific Heat (Csp)
Replies: 3
Views: 249

### Re: Specific Heat (Csp)

It will most likely be given but its safe to know how to approach the question when its not.
Tue Jan 29, 2019 12:38 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Cv versus Cp
Replies: 4
Views: 201

### Re: Cv versus Cp

yeah its always true not just for the example
Tue Jan 29, 2019 12:38 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: lecture notes
Replies: 1
Views: 134

### Re: lecture notes

maybe the TA's?
Tue Jan 29, 2019 12:37 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: 4A.1
Replies: 2
Views: 91

### Re: 4A.1

the manual says its a closed system. i dont know why they put it like that in the book though.
Tue Jan 29, 2019 12:35 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy equations
Replies: 2
Views: 95

### Re: Enthalpy equations

No i dont think so because he didnt mention it
Tue Jan 29, 2019 12:34 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimetry
Replies: 5
Views: 243

### Re: Calorimetry

yeah the bomb calorimeters keeps a constant volume while the other keeps constant pressure. he might do examples on it
Tue Jan 22, 2019 8:55 am
Forum: Ideal Gases
Topic: ICE table
Replies: 5
Views: 427

### Re: ICE table

Our TA said something about learning to write it in bar but i dont think its required to do so. maybe that is just easier for some people
Tue Jan 22, 2019 8:54 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ignoring x
Replies: 10
Views: 327

### Re: ignoring x

we ignore it when its = to or less than 10^3 because its a really small number that wont make a big difference to the answer
Tue Jan 22, 2019 8:52 am
Forum: Administrative Questions and Class Announcements
Topic: Discussion Section Test
Replies: 4
Views: 238

### Re: Discussion Section Test

Usually these isnt really any MC unless its a concept that he wanted us to remember from lecture, but the ones worth more and that take up like 90% of the test is the short answers.
Tue Jan 22, 2019 8:49 am
Forum: Administrative Questions and Class Announcements
Topic: Number of questions on test one [ENDORSED]
Replies: 39
Views: 18592

### Re: Number of questions on test one[ENDORSED]

if its similar to 14A then its usually 8 questions (some with sub parts) for 40 min
Tue Jan 22, 2019 8:47 am
Forum: Phase Changes & Related Calculations
Topic: Endothermic or Exothermic
Replies: 20
Views: 911

### Re: Endothermic or Exothermic

Exothermic because heat is being released
Sun Jan 13, 2019 5:00 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: True or False regarding reaction mixture [ENDORSED]
Replies: 10
Views: 294

### Re: True or False regarding reaction mixture[ENDORSED]

yeah thats correct
Sun Jan 13, 2019 4:59 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equations
Replies: 10
Views: 295

### Re: equations

usually reactants are on the left and products on the write and when its not given to us straight forward we first have to figure out what the chemical equation is.
Sun Jan 13, 2019 4:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equations
Replies: 6
Views: 238

### Re: Equations

Kc- concentration and Kp- partial pressure
Sun Jan 13, 2019 4:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equilibrium Criteria
Replies: 4
Views: 184

### Re: Equilibrium Criteria

Q and K have to equal each other, then its at equilibrium.
Sat Dec 08, 2018 9:12 pm
Forum: Student Social/Study Group
Topic: Studying for tests/midterm
Replies: 18
Views: 1553

### Re: Studying for tests/midterm

which videos do you find most helpful?
Sat Dec 08, 2018 9:10 pm
Forum: Student Social/Study Group
Topic: Structure of the final
Replies: 4
Views: 454

### Re: Structure of the final

Should be of similar structure to the midterm, just with everything included
Sat Dec 08, 2018 9:09 pm
Forum: Student Social/Study Group
Topic: Practice Final
Replies: 2
Views: 499

### Re: Practice Final

i think that was the only one made
Sun Dec 02, 2018 2:34 pm
Forum: Administrative Questions and Class Announcements
Topic: Tutoring? [ENDORSED]
Replies: 75
Views: 72484

### Re: Tutoring?[ENDORSED]

In sessions who does the questions step by step even if they seem obvious?
Sun Dec 02, 2018 2:33 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strength of an acid
Replies: 14
Views: 875

### Re: Strength of an acid

Across a row in periodic table, acidity increases with the increase in electronegativity.
Sun Dec 02, 2018 2:31 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acid vs base [ENDORSED]
Replies: 15
Views: 591

### Re: Acid vs base[ENDORSED]

Lewis acid accepts electrons and Lewis base donates electrons.
Sun Dec 02, 2018 2:27 pm
Forum: Student Social/Study Group
Topic: Chemistry News
Replies: 76
Views: 49807

### Re: Chemistry News

does anyone know is there is gonna be a study guide?
Sat Nov 24, 2018 12:25 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: on test? [ENDORSED]
Replies: 3
Views: 252

### Re: on test?[ENDORSED]

the syllabus says what is going to be on each test exactly.
Sat Nov 24, 2018 12:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr model
Replies: 3
Views: 187

### Re: vsepr model

Im not sure if this was explained in lecture.
Sat Nov 24, 2018 12:21 pm
Forum: Hybridization
Topic: Writing out Hybridization
Replies: 8
Views: 280

### Re: Writing out Hybridization

in lecture Dr. Lavelle said it didn't matter where you placed D either in the beginning or end because he does it different from how the book does it.
Sat Nov 24, 2018 12:19 pm
Forum: Hybridization
Topic: stating the hybridization of an atom
Replies: 3
Views: 152

### Re: stating the hybridization of an atom

i would say it has to be 2 but maybe your TA can be more flexible with it so just ask to be safe
Sat Nov 17, 2018 11:54 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 3
Replies: 19
Views: 607

### Re: Test 3

He said its easier if we memorize them so i suggest to learn.
Sat Nov 17, 2018 11:52 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Polar and Dipole
Replies: 3
Views: 115

### Re: Polar and Dipole

If a molecule is polarized then there is a positive and negative dipole
Sat Nov 17, 2018 11:50 am
Forum: Administrative Questions and Class Announcements
Topic: How to find my posts
Replies: 75
Views: 48839

### Re: How to find my posts

Does anyone what is going to be on exam three?
Sat Nov 17, 2018 11:41 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Seesaw Shape
Replies: 4
Views: 194

### Re: Seesaw Shape

Yeah but they will be just slightly less than those angles, but for approximation thats right.
Sun Nov 11, 2018 12:08 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Dipole Moment
Replies: 3
Views: 159

### Re: Dipole Moment

The bond dipole moment uses the idea of electric dipole moment to measure the polarity of a chemical bond within a molecule. It occurs whenever there is a separation of positive and negative charges, or when more electrons are being pulled to one side more than the other.
Sun Nov 11, 2018 12:06 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Greater polarizability of larger molecules
Replies: 6
Views: 326

### Re: Greater polarizability of larger molecules

The greater the number of electrons, the less control the nuclear charge has on charge distribution, and thus the increased polarizability of the atom.
Sun Nov 11, 2018 11:55 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen Bonds
Replies: 14
Views: 429

### Re: Hydrogen Bonds

yes its a dipole-dipole bond and it only works with the atoms N O F
Sun Nov 11, 2018 11:52 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Boiling point
Replies: 12
Views: 664

### Re: Boiling point

The rod and spherical shaped molecules have different boiling points which is why they have different shapes. With spherical shaped molecules having a lower boiling point.
Sun Nov 04, 2018 9:06 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 7070

### Re: MIDTERM PRACTICE - Garlic Bread Review Session[ENDORSED]

Thank you for this review it has really been helping me understand things better!
Sun Nov 04, 2018 8:15 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 7070

### Re: MIDTERM PRACTICE - Garlic Bread Review Session[ENDORSED]

does anyone know how to solve 8b? i am having trouble with it.
Sun Nov 04, 2018 6:32 pm
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM PRACTICE - Garlic Bread Review Session [ENDORSED]
Replies: 121
Views: 7070

### Re: MIDTERM PRACTICE - Garlic Bread Review Session[ENDORSED]

Can anyone explain the reasoning for why 6d is true.
Sat Oct 27, 2018 6:59 pm
Forum: Ionic & Covalent Bonds
Topic: Chemical Bonding
Replies: 8
Views: 318

### Re: Chemical Bonding

Yeah as of now we have just learned the basics of it but we should be going into more detail this coming week, but i do not know exactly how in depth we will go.
Sat Oct 27, 2018 6:55 pm
Forum: Ionic & Covalent Bonds
Topic: Bond
Replies: 9
Views: 421

### Re: Bond

I am pretty sure that we do not have to worry about that for this class because of their complexity, but it would be fun to know.
Sat Oct 27, 2018 6:51 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons
Replies: 4
Views: 165

### Re: Valence Electrons

Group 2 has 2 valence electrons and group 13 has 3 valence electrons........ etc...
Sun Oct 21, 2018 9:29 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Test Question
Replies: 8
Views: 306

### Re: Test Question

We dont need to draw them but know what each represents.
Sun Oct 21, 2018 9:23 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Schrodinger's Wave Function
Replies: 10
Views: 403

### Re: Schrodinger's Wave Function

Just know the concepts behind the equation, but no calculation will be on the test. we are not expected to know how to do that.
Sun Oct 21, 2018 9:20 pm
Forum: Properties of Light
Topic: Test #2
Replies: 2
Views: 166

### Re: Test #2

Exams will always be in discussion, but midterm and final arent.
Sun Oct 14, 2018 8:11 pm
Forum: Einstein Equation
Topic: Einstein's Equation: E=hv
Replies: 11
Views: 654

### Re: Einstein's Equation: E=hv

H is a constant and it is given to us.
Sun Oct 14, 2018 8:10 pm
Forum: Properties of Light
Topic: C=Wavelength*Frequency
Replies: 11
Views: 735

### Re: C=Wavelength*Frequency

C is a constants that represents the speed if light which will be given.
Sun Oct 14, 2018 8:08 pm
Forum: Einstein Equation
Topic: Numbers to memorize [ENDORSED]
Replies: 37
Views: 1826

### Re: Numbers to memorize[ENDORSED]

Constants and equations will always be provided at the beginning of the test.
Sun Oct 14, 2018 8:05 pm
Forum: SI Units, Unit Conversions
Topic: formula units [ENDORSED]
Replies: 69
Views: 24884

### Re: formula units[ENDORSED]

The numbers on the numerator are constants which will always be given and they are found on the "constants and Equations" worksheet.
Sun Oct 07, 2018 8:31 pm
Forum: Limiting Reactant Calculations
Topic: Theoretical Yield
Replies: 7
Views: 404

### Re: Theoretical Yield

Its larger because its the maximum amount possible.
Sun Oct 07, 2018 8:25 pm
Forum: Properties of Light
Topic: Chapter 1 Homework
Replies: 6
Views: 343

### Re: Chapter 1 Homework

Porus_Karwa_3B wrote:Is Chapter 1 homework due in our next discussion period or is it due on the one after that?

I think they said to do problems that were relevant to what we were learning.
Sun Oct 07, 2018 8:22 pm
Forum: Balancing Chemical Reactions
Topic: Balancing Procedure
Replies: 7
Views: 391

### Re: Balancing Procedure

Celeste 1C wrote:Question h.1 asks why you can't just add an extra O molecule to balance the equation? Why wouldn't we be able to do that?

I remember that in lecture Dr. Lavelle said that atoms were not created nor destroyed.
Sun Oct 07, 2018 12:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Registering/Creating Your Chemistry Community Account
Replies: 25
Views: 44442

### Re: Registering/Creating Your Chemistry Community Account

They are due on Sunday.