## Search found 75 matches

Tue Mar 10, 2020 7:27 pm
Forum: Student Social/Study Group
Topic: Final Exam
Replies: 22
Views: 618

### 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: 5
Views: 140

### 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: 47

### 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: 58

### 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: 36

### 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: 179

### 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: 467

### 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: 91

### 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: 54

### 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: 69

### 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: 63

### 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: 144

### 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: 84

### 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: 78

### 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: 75

### 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: 51

### 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: 10
Views: 246

### 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: 56

### 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)
Replies: 11
Views: 222

Omg! Yes! ALWAYS
Tue Feb 18, 2020 10:20 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Reversible Systems
Replies: 4
Views: 198

### 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: 269

### 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: 283

### 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: 71

### 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: 263

### 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: 224

### 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: 295

### 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: 64

### 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: 68

### 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: 61

### 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: 56

### 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: 18

### 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: 85

### 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: 66

### 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: 36

### 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: 20

### 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: 107

### 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: 44

### 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: 19

### 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: 55

### 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: 67

### 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: 291
Views: 136075

### Re: Saying Thank You to Dr. Lavelle

Hello sir,
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: 178
Views: 34482

### 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
Replies: 6
Views: 68

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
Replies: 10
Views: 100

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: 42

### 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: 101

### 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: 38

### 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: 60

### 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: 57

### 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: 35

### 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: 191

### Final Exam

Is the final exam cumulative?
Tue Nov 12, 2019 6:19 pm
Forum: Hybridization
Topic: Specifics
Replies: 3
Views: 74

### 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: 38

### 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: 69

### Drawing

Do we need to know how to draw the shape of different bonds?
Tue Nov 12, 2019 6:17 pm
Forum: Naming
Topic: Naming
Replies: 6
Views: 113

### 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: 165

### 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: 190

### 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: 510

### 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: 74

### 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: 52

### VESPR

What is the difference between electronic density shape and molecular shape?
Sun Nov 03, 2019 9:49 pm
Topic: Midterm
Replies: 3
Views: 157

### 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: 47

### 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: 125

### 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: 152

### 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: 71

### 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: 491

### 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: 35

### 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: 107

### 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: 281

### 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: 44

### 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: 149

### 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
Replies: 153
Views: 105490

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: 146

### 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: 128

### 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: 340

### 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?