Search found 75 matches
- Tue Mar 10, 2020 7:27 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 22
- Views: 1737
Final Exam
Sooooooo how is this exam working now that were gonna be online?
- Tue Mar 10, 2020 7:26 pm
- Forum: Van't Hoff Equation
- Topic: When to use
- Replies: 15
- Views: 1257
When to use
When is this equation used?
- Tue Mar 10, 2020 7:25 pm
- Forum: First Order Reactions
- Topic: Replacing Ln
- Replies: 2
- Views: 270
Replacing Ln
Could we replace ln with log?
- Tue Mar 10, 2020 7:24 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Will We
- Replies: 2
- Views: 267
Will We
Will we have to calculate Acivation NRG with this equation or just K ?
- Tue Mar 10, 2020 7:23 pm
- Forum: Zero Order Reactions
- Topic: Graphs
- Replies: 4
- Views: 324
Graphs
How does the graph look for zero order reactions?
- Wed Mar 04, 2020 7:31 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst
- Replies: 10
- Views: 825
Re: Nernst
Ln is easier and often used more.
- Wed Mar 04, 2020 7:21 pm
- Forum: Balancing Redox Reactions
- Topic: Half rxns
- Replies: 27
- Views: 1638
Half rxns
What differs when balancing acidic vs basic rxns?
- Wed Mar 04, 2020 7:18 pm
- Forum: Balancing Redox Reactions
- Topic: Half reactions
- Replies: 6
- Views: 509
Re: Half reactions
You add H20 first silly billy!
- Wed Mar 04, 2020 7:15 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: How to
- Replies: 1
- Views: 242
How to
How do you find free NRG using entropy and enthalpy?
- Wed Mar 04, 2020 7:13 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic Cell
- Replies: 2
- Views: 295
Galvanic Cell
What is a galvanic cell?
- Tue Feb 25, 2020 8:54 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: nernst 2
- Replies: 3
- Views: 345
Re: nernst 2
The units are volts which are J/C
- Tue Feb 25, 2020 8:52 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: nerst
- Replies: 7
- Views: 576
Re: nerst
You must first balance the equation and then use the number of electrons you cancel out as the value for n.
- Tue Feb 25, 2020 8:43 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 3
- Views: 314
Cell Diagrams
How do we choose what solid to put at the beginning?
- Tue Feb 25, 2020 8:42 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 4
- Views: 362
Cell Diagrams
What order do we put the oxidation compounds in the diagram?
- Tue Feb 25, 2020 8:38 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Standard Cell Potential
- Replies: 4
- Views: 323
Standard Cell Potential
What is the difference between E naught and E?
- Tue Feb 18, 2020 10:59 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: delta g vs delta g°
- Replies: 2
- Views: 281
Re: delta g vs delta g°
Delta G naught is for a standard reaction ya silly goose! The normal delta g is for the overall reaction! hope that helps .
- Tue Feb 18, 2020 10:44 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Spontaneous
- Replies: 20
- Views: 1411
Re: Spontaneous
well good sir, if the value is negative, it is spontaneous, meaning left over NRG in the form of heat is exuded from the reaction.
- Tue Feb 18, 2020 10:25 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs Free naught
- Replies: 2
- Views: 266
Gibbs Free naught
Why is it that we can include Q and K in the equation? How do you know when to you which?
- Tue Feb 18, 2020 10:21 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Adiabatic systems
- Replies: 14
- Views: 895
Re: Adiabatic systems
Omg! Yes! ALWAYS
- Tue Feb 18, 2020 10:20 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Reversible Systems
- Replies: 4
- Views: 487
Re: Reversible Systems
I'll tell ya bud. Irreversible has a constant pressure (smaller area in curve) and reversible doesn't (bigger area in curve). Hope that helps buddy o !
- Fri Feb 14, 2020 2:06 pm
- Forum: Ideal Gases
- Topic: pv=nrt
- Replies: 19
- Views: 1300
pv=nrt
can you use this equation when at STP?
- Fri Feb 14, 2020 2:03 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible vs Irreversible
- Replies: 13
- Views: 951
Reversible vs Irreversible
What do these titles determine about one's system, and in turn what equation do you use?
- Fri Feb 14, 2020 1:54 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy equation
- Replies: 3
- Views: 318
Entropy equation
When can I use the delta S= q(rev)/T equation?
- Fri Feb 14, 2020 1:52 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Delta H
- Replies: 10
- Views: 1005
Delta H
How do you find the change in enthalpy for a reaction if you aren't given the values?
- Fri Feb 14, 2020 1:48 pm
- Forum: Phase Changes & Related Calculations
- Topic: Equation Choice
- Replies: 5
- Views: 597
Equation Choice
What defines a phase change and how does that relate to which equation you use?
- Thu Feb 06, 2020 4:38 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Topics on the Midterm
- Replies: 22
- Views: 1397
Re: Topics on the Midterm
Is Friday's lecture included in the midterm?
- Thu Feb 06, 2020 4:37 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: units
- Replies: 4
- Views: 204
units
When is it okay to keep the units in g/celsius?
- Thu Feb 06, 2020 4:36 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Cp/Cv
- Replies: 7
- Views: 450
Cp/Cv
If an entropy/delta T problem doesn't specifically state it, do we assume it is at constant pressure or constant volume?
- Thu Feb 06, 2020 4:32 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacities
- Replies: 2
- Views: 249
Heat Capacities
How do we calculate heat capacities for diatomic molecules?
- Thu Feb 06, 2020 4:31 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Calorimeter
- Replies: 5
- Views: 436
Calorimeter
What is a calorimeter and how does it relate to heat capacities?
- Tue Jan 28, 2020 9:40 am
- Forum: Phase Changes & Related Calculations
- Topic: Bond Breakage/NRG Stability
- Replies: 1
- Views: 84
Bond Breakage/NRG Stability
How is it that when bonds are broken and NRG is released, a compound is more stable?
- Tue Jan 28, 2020 9:38 am
- Forum: Phase Changes & Related Calculations
- Topic: State Functions
- Replies: 9
- Views: 552
State Functions
How would you define state functions, and why is enthalpy not considered one?
- Tue Jan 28, 2020 9:35 am
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy and Heat
- Replies: 6
- Views: 247
Re: Enthalpy and Heat
In a way, enthalpy is the amount of heat released or absorbed in a reaction.
- Tue Jan 28, 2020 9:34 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Reaction Enthalpies
- Replies: 2
- Views: 195
Reaction Enthalpies
Will we be provided the enthalpies of each compound when calculating the reaction enthalpies?
- Tue Jan 28, 2020 9:31 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Reaction Enthalpies
- Replies: 1
- Views: 81
Reaction Enthalpies
Are we expected to know how to calcuate using all 3 methods or is there a focus on one over the other?
- Wed Jan 22, 2020 8:06 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Polyprotic Acids
- Replies: 6
- Views: 487
Polyprotic Acids
What is the difference between k1 and k2?
- Wed Jan 22, 2020 8:05 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Approximation
- Replies: 5
- Views: 181
Approximation
What is the threshold for concentrations in which we are allowed to approximate?
- Wed Jan 22, 2020 8:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Approximation
- Replies: 2
- Views: 93
Approximation
How do we check if our approximation is correct when finding ph?
- Wed Jan 22, 2020 8:03 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Buffers
- Replies: 3
- Views: 136
Buffers
Will we have to know how to create a buffer for the test this week?
- Wed Jan 22, 2020 8:03 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Acids and Bases
- Replies: 6
- Views: 200
Acids and Bases
Will we have to know about polyprotic acids for the test this week?
- Thu Jan 16, 2020 10:06 am
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 893917
Re: Saying Thank You to Dr. Lavelle
Hello sir,
Thank you for all you do. I love the jokes at the end of class :)
Thank you for all you do. I love the jokes at the end of class :)
- Thu Jan 16, 2020 10:05 am
- Forum: Student Social/Study Group
- Topic: Final Jitters
- Replies: 457
- Views: 640779
Re: Final Jitters
It helps to take 10 minutes before the exam to focus and breathe and just sit. It's very calming and helpful to remember you're more than a test grade.
- Thu Jan 16, 2020 9:53 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic
- Replies: 6
- Views: 225
Quadratic
Do we have to memorize this equation or will it be given on tests?
- Thu Jan 16, 2020 9:53 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic
- Replies: 10
- Views: 339
Quadratic
What do you do if the after using the quadratic equation and you get two positive answers?
- Thu Jan 16, 2020 9:52 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Factos effecting Equilibrium
- Replies: 6
- Views: 313
Factos effecting Equilibrium
What factors affect equilibrium? Is it just temperature and pressure?
- Thu Jan 09, 2020 3:13 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q
- Replies: 10
- Views: 518
Q
Can the reactant quotient apply to both concentration and partial pressure, just as K does?
- Thu Jan 09, 2020 3:12 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Q
- Replies: 4
- Views: 184
Q
How does the reactant quotient relates to K?
- Thu Jan 09, 2020 3:10 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Purity
- Replies: 3
- Views: 187
Purity
Does the pureness of products or reactants affect equilibrium constant?
- Thu Jan 09, 2020 3:07 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Pressure
- Replies: 4
- Views: 280
Pressure
Does a higher pressure affect the equilibrium constant?
- Thu Jan 09, 2020 3:03 pm
- Forum: Ideal Gases
- Topic: Ideal Gases
- Replies: 3
- Views: 163
Ideal Gases
What exactly do we need to know about gases for this unit? Just a basic understanding of PV=nRT?
- Tue Nov 12, 2019 6:20 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 10
- Views: 781
Final Exam
Is the final exam cumulative?
- Tue Nov 12, 2019 6:19 pm
- Forum: Hybridization
- Topic: Specifics
- Replies: 3
- Views: 297
Specifics
Should we be able to visually depict the hybridization or is the short cut- way of finding it out enough?
- Tue Nov 12, 2019 6:18 pm
- Forum: Dipole Moments
- Topic: Distinguishing Types
- Replies: 1
- Views: 123
Distinguishing Types
What is the difference between the different type of dipole-dipole interactions?
- Tue Nov 12, 2019 6:17 pm
- Forum: Sigma & Pi Bonds
- Topic: Drawing
- Replies: 6
- Views: 380
Drawing
Do we need to know how to draw the shape of different bonds?
Naming
How important is it to know exactly how to name compounds for the test?
- Thu Nov 07, 2019 2:23 pm
- Forum: SI Units, Unit Conversions
- Topic: Photons
- Replies: 3
- Views: 365
Photons
Is eV the unit that photons are measured in?
- Thu Nov 07, 2019 2:22 pm
- Forum: SI Units, Unit Conversions
- Topic: Kj
- Replies: 6
- Views: 576
Kj
Is the conversion for killograms that same that is used for kilojules?
- Thu Nov 07, 2019 2:20 pm
- Forum: Hybridization
- Topic: Pi bonds
- Replies: 8
- Views: 1035
Re: Pi bonds
What is the difference between pi and sigma?
- Thu Nov 07, 2019 2:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VESPR
- Replies: 5
- Views: 422
VESPR
Is there a table that has all the names/shapes we need to know? How does everyone know them already ???
- Thu Nov 07, 2019 2:18 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VESPR
- Replies: 2
- Views: 156
VESPR
What is the difference between electronic density shape and molecular shape?
- Sun Nov 03, 2019 9:49 pm
- Forum: *Black Body Radiation
- Topic: Midterm
- Replies: 3
- Views: 498
Midterm
Do we need to know this concept for the first midterm?
- Sun Nov 03, 2019 9:49 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Visualizing orbitals
- Replies: 1
- Views: 129
Visualizing orbitals
How do you describe the interpretation of atomic orbitals in terms of probability?
- Sun Nov 03, 2019 9:48 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger's Equation
- Replies: 1
- Views: 253
Schrodinger's Equation
What is the relationship between Schrodinger's equation (H ψ = E ψ), wave functions, and orbitals?
- Sun Nov 03, 2019 9:47 pm
- Forum: Properties of Electrons
- Topic: Electrons
- Replies: 1
- Views: 252
Electrons
What are the factors affecting the energy of an electron in a many-electron atom?
- Sun Nov 03, 2019 9:46 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Quantum World Guidelines
- Replies: 1
- Views: 157
Quantum World Guidelines
One of the Quantum World Guidelines states: * With respect to electron transitions that give rise to a UV or visible spectrum: understand the difference between electronic transitions in atomic orbitals (atomic spectroscopy) and electronic transitions in molecular orbitals (molecular spectroscopy). ...
- Sun Oct 13, 2019 5:10 pm
- Forum: *Shrodinger Equation
- Topic: General Question on Schrodinger Equation
- Replies: 2
- Views: 703
Re: General Question on Schrodinger Equation
Will we need to know how the equation was derived?
- Sun Oct 13, 2019 5:04 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Visualizing orbitals
- Replies: 1
- Views: 87
Visualizing orbitals
Do we need to memorize the order/presdentaion of 1s,2s, orbitals aka figure 2.12 in the textbook?
- Sun Oct 13, 2019 5:01 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Electron Configuration
- Replies: 5
- Views: 276
Electron Configuration
In terms of electron configuration/orbitals, I understand where the s,p,d,and f come from but what defines the number that pretenses it. For example 1s, 2d or 3p, what do those numbers represent and how does one distinguish or assign an element as occupying 2p vs 3p?
- Sun Oct 13, 2019 4:56 pm
- Forum: *Particle in a Box
- Topic: Particle in A box
- Replies: 8
- Views: 1073
Particle in A box
Is the Particle in a box experiment vital to know for the midterm? Or is just a concept that is skimmed over?
- Sun Oct 13, 2019 4:55 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger's Equation
- Replies: 1
- Views: 92
Schrodinger's Equation
Do we need to know this equation/its different forms, be able to calculate answers of NRG levels using it?
- Wed Oct 02, 2019 10:50 pm
- Forum: Ideal Gases
- Topic: Module Questions- Balancing Equations
- Replies: 4
- Views: 336
Module Questions- Balancing Equations
I came across this problem in one of the modules: During a summer camping weekend 4 moles of butane (C4H10) gas were used for cooking. Chose the right balanced equation for the combustion of 4 moles of butane gas. What is the net number of moles of gas produced? What do they mean by net number and h...
- Wed Oct 02, 2019 10:49 pm
- Forum: Ideal Gases
- Topic: Reading the textbook
- Replies: 262
- Views: 174472
Re: Reading the textbook
I know that in the course reader it says to read chapter 5 for a review for gases. But every time i try reading the textbook i get intimidated and i stop reading the textbook . Do you guys find it more helpful when you guys read the textbook? Although it's hard to follow at times, I feel like it ca...
- Wed Oct 02, 2019 10:46 pm
- Forum: Empirical & Molecular Formulas
- Topic: Rounding for Formulas
- Replies: 8
- Views: 487
Re: Rounding for Formulas
I noticed the solution manual often rounds to a whole number when dealing with mass, should we do the same?
- Wed Oct 02, 2019 10:44 pm
- Forum: Empirical & Molecular Formulas
- Topic: Empirical and Molecular Formula Masses
- Replies: 5
- Views: 306
Re: Empirical and Molecular Formula Masses
In terms of finding the Empirical formula, you wouldn't need molar mass to solve that problem right?
- Wed Oct 02, 2019 10:42 pm
- Forum: SI Units, Unit Conversions
- Topic: Sig figs
- Replies: 18
- Views: 765
Re: Sig figs
How important is it to know all the rules for sig figs? I feel like I know some basics but not the more specific rules that pertain to addition/subtraction or multiplication/division?