Search found 59 matches

by Ronald Thompson 1F
Sat Mar 16, 2019 10:43 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: q and delta H
Replies: 6
Views: 259

Re: q and delta H

They can be used interchangeably
by Ronald Thompson 1F
Sat Mar 16, 2019 10:02 pm
Forum: First Order Reactions
Topic: Half-Lives
Replies: 4
Views: 209

Re: Half-Lives

Yes it is useful to know how to use them.
by Ronald Thompson 1F
Sat Mar 16, 2019 10:01 pm
Forum: Administrative Questions and Class Announcements
Topic: Final questions
Replies: 1
Views: 203

Re: Final questions

Usually around 8 but they will be multi-step problems.
by Ronald Thompson 1F
Sat Mar 16, 2019 10:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 18
Views: 512

Re: Final

There will most likely be a pretty fair distribution of content, but leaning more towards thermo and kinetics
by Ronald Thompson 1F
Sat Mar 16, 2019 9:59 pm
Forum: Administrative Questions and Class Announcements
Topic: Sig Figs
Replies: 9
Views: 302

Re: Sig Figs

They are checked but will not be super important. Just a couple points per problem
by Ronald Thompson 1F
Sat Mar 16, 2019 9:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Deadline to post
Replies: 7
Views: 292

Re: Deadline to post

The deadline ends tomorrow for submissions. But I would assume you could post after the final as well
by Ronald Thompson 1F
Sun Mar 10, 2019 4:39 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts
Replies: 6
Views: 99

Re: Catalysts

They increase the speed of a reaction
by Ronald Thompson 1F
Sun Mar 10, 2019 4:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2 averages
Replies: 4
Views: 111

Re: Test 2 averages

Agreed, the test was challenging
by Ronald Thompson 1F
Sun Mar 10, 2019 4:10 pm
Forum: First Order Reactions
Topic: Half Life for First Order
Replies: 3
Views: 53

Re: Half Life for First Order

isolating t1/2 and halving A should get you the half life with some calculus.
by Ronald Thompson 1F
Sun Mar 10, 2019 4:07 pm
Forum: Second Order Reactions
Topic: Kinetics on the Final
Replies: 2
Views: 70

Re: Kinetics on the Final

He noted that we were ahead of schedule, so I would expect anything and everything to be covered in that regard.
by Ronald Thompson 1F
Sat Feb 23, 2019 2:40 pm
Forum: Balancing Redox Reactions
Topic: distinguishing between acidic and basic solutions
Replies: 3
Views: 69

Re: distinguishing between acidic and basic solutions

It will likely tell you if it isn't clear
by Ronald Thompson 1F
Sat Feb 23, 2019 2:39 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Test 2 Help
Replies: 7
Views: 141

Re: Test 2 Help

We wont be tested on that
by Ronald Thompson 1F
Sat Feb 23, 2019 2:38 pm
Forum: Student Social/Study Group
Topic: How are you guys going to study for Test 2?
Replies: 10
Views: 166

Re: How are you guys going to study for Test 2?

Going over lecture notes, making sure I understand key concepts, and then just nailing homework problems.
by Ronald Thompson 1F
Tue Feb 19, 2019 8:07 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: What to do when temperature isn't given
Replies: 8
Views: 137

Re: What to do when temperature isn't given

If not given, which it usually is... us 25 degrees C or 298 K
by Ronald Thompson 1F
Tue Feb 19, 2019 8:05 pm
Forum: Student Social/Study Group
Topic: Test
Replies: 17
Views: 404

Re: Test

Is it thermodynamics after the midterm or inclusive of all thermo?
by Ronald Thompson 1F
Sun Feb 10, 2019 2:17 pm
Forum: Calculating Work of Expansion
Topic: Using Derivative/Integral Equations
Replies: 5
Views: 98

Re: Using Derivative/Integral Equations

You will not need to solve integrations. Just know what equations you get from the integrations. Those are applicable to different questions and the circumstances
by Ronald Thompson 1F
Sun Feb 10, 2019 2:16 pm
Forum: Administrative Questions and Class Announcements
Topic: UA Sessions Today
Replies: 2
Views: 88

Re: UA Sessions Today

Check Lavelle's website for all updates, review times, and more
by Ronald Thompson 1F
Sun Feb 10, 2019 2:15 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Midterm #1 14B
Replies: 17
Views: 546

Re: Midterm #1 14B

Is there a solutions guide as well?
by Ronald Thompson 1F
Sun Feb 10, 2019 2:15 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Degeneracy
Replies: 4
Views: 93

Re: Degeneracy

You have to look at the number of different arrangements of atoms. Best way is to draw lewis structures
by Ronald Thompson 1F
Sun Feb 03, 2019 2:25 pm
Forum: Phase Changes & Related Calculations
Topic: Steam resulting in burns?
Replies: 6
Views: 105

Re: Steam resulting in burns?

Steam at 100 degrees gives off a lot more heat, thus burns more. There is a chart in the textbook that explains it much better
by Ronald Thompson 1F
Sun Feb 03, 2019 2:22 pm
Forum: Calculating Work of Expansion
Topic: Units for pressure
Replies: 10
Views: 159

Re: Units for pressure

For a final answer I believe you want to use atm unless otherwise stated. You might have to do some conversions (Torr to atm)
by Ronald Thompson 1F
Sun Feb 03, 2019 2:18 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimeter
Replies: 6
Views: 112

Re: Calorimeter

Focus on the processes behind the calorimeter example.
by Ronald Thompson 1F
Sun Feb 03, 2019 2:16 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Midterm Exam Content
Replies: 4
Views: 87

Re: Midterm Exam Content

Look at the course website for the update/rundown
by Ronald Thompson 1F
Tue Jan 29, 2019 11:52 am
Forum: Calculating Work of Expansion
Topic: reversible process
Replies: 3
Views: 67

Re: reversible process

Yes, R is the same because it is a constant. It will be given on the constants and equations sheet
by Ronald Thompson 1F
Tue Jan 29, 2019 11:50 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: eq constants for acids
Replies: 4
Views: 105

Re: eq constants for acids

Yes, because strong acids dissociate completely
by Ronald Thompson 1F
Sun Jan 20, 2019 5:58 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Water in the Equilibrium Constant.
Replies: 4
Views: 71

Re: Water in the Equilibrium Constant.

We don't pay much attention to liquids and solids in this regard
by Ronald Thompson 1F
Sun Jan 20, 2019 5:56 pm
Forum: Student Social/Study Group
Topic: test 1
Replies: 10
Views: 408

Re: test 1

Test 1 will cover Equilibuium and Acid and Base equilibrium as stated by the announcements
by Ronald Thompson 1F
Mon Jan 14, 2019 9:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc, Kw, and pKw
Replies: 4
Views: 586

Re: Kc, Kw, and pKw

These will be important to memorize, as they do not show up on the constants and equations sheet.
by Ronald Thompson 1F
Mon Jan 14, 2019 9:14 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: change in pressure
Replies: 4
Views: 85

Re: change in pressure

The Process works in both directions depending on the moles of gas on either side.
by Ronald Thompson 1F
Fri Dec 07, 2018 11:06 pm
Forum: Hybridization
Topic: Sigma and pi bonds
Replies: 4
Views: 113

Re: Sigma and pi bonds

I believe he just wants the hybridization of the central atom or whatever atoms he asks. However just incase wouldn't hurt to do a couple of practice problems
by Ronald Thompson 1F
Fri Dec 07, 2018 11:03 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Function of polydentate ligand
Replies: 2
Views: 71

Re: Function of polydentate ligand

You can bond multiple atoms.
by Ronald Thompson 1F
Fri Dec 07, 2018 11:02 pm
Forum: Naming
Topic: Chloro v/s chlorido
Replies: 6
Views: 136

Re: Chloro v/s chlorido

You would use an elements base name for prefix and suffix of coordination compound.
by Ronald Thompson 1F
Thu Dec 06, 2018 5:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Topics
Replies: 3
Views: 146

Re: Final Topics

From what I have seen from two practice exams it is an even breakdown. Most will incorporate many topics into multi-step problems
by Ronald Thompson 1F
Sun Dec 02, 2018 3:22 pm
Forum: Naming
Topic: With Respect to the Final
Replies: 9
Views: 206

Re: With Respect to the Final

It is best to be comfortable with both. It will only help
by Ronald Thompson 1F
Mon Nov 26, 2018 9:33 pm
Forum: Dipole Moments
Topic: TEST 3: Polarity
Replies: 7
Views: 164

Re: TEST 3: Polarity

Arrows point to the atom with the negative charge.
by Ronald Thompson 1F
Mon Nov 26, 2018 9:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Textbook
Replies: 3
Views: 97

Re: Textbook

Yes, the textbook if for both classes
by Ronald Thompson 1F
Mon Nov 26, 2018 9:29 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework question
Replies: 4
Views: 59

Re: Homework question

Formal charge.
by Ronald Thompson 1F
Mon Nov 26, 2018 9:29 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Most Favorable Placement of Formal Charges
Replies: 2
Views: 255

Re: Most Favorable Placement of Formal Charges

I believe for the purposes of this class the spread of the charges doesn't quite matter. I do not recall coming across a problem where the two possibilities have the same formal charge.
by Ronald Thompson 1F
Sun Nov 04, 2018 8:18 pm
Forum: Lewis Structures
Topic: Double bonds vs. lone pairs
Replies: 5
Views: 66

Re: Double bonds vs. lone pairs

Count the total valence electrons and arrange them in a ways that satisfies the elements' octect.
by Ronald Thompson 1F
Sun Nov 04, 2018 8:16 pm
Forum: Ionic & Covalent Bonds
Topic: Test bank?
Replies: 9
Views: 399

Re: Test bank?

Also try reaching out to past students who have taken the class
by Ronald Thompson 1F
Sun Nov 04, 2018 8:15 pm
Forum: Administrative Questions and Class Announcements
Topic: Monday review sessions
Replies: 2
Views: 97

Re: Monday review sessions

I would assume there would be different problems, but if not there's no hurt in the extra practice.
by Ronald Thompson 1F
Sun Oct 28, 2018 10:36 pm
Forum: Ionic & Covalent Bonds
Topic: Good practice options for lewis structures?
Replies: 3
Views: 78

Re: Good practice options for lewis structures?

You could look up common bonds and try drawing them out yourself as practice.
by Ronald Thompson 1F
Sun Oct 28, 2018 10:35 pm
Forum: Trends in The Periodic Table
Topic: s-block and p-block reactivity?
Replies: 6
Views: 120

Re: s-block and p-block reactivity?

Yes, having lower ionization makes it easier for them to gain or lose electrons.
by Ronald Thompson 1F
Sun Oct 28, 2018 10:33 pm
Forum: Ionic & Covalent Bonds
Topic: Difference Between Ionic and Covalent Bonds
Replies: 4
Views: 70

Re: Difference Between Ionic and Covalent Bonds

You can also tell by where the atoms are on the periodic table.
by Ronald Thompson 1F
Sun Oct 21, 2018 8:37 pm
Forum: DeBroglie Equation
Topic: 1B. 25 7th Edition
Replies: 2
Views: 58

Re: 1B. 25 7th Edition

Great explanation
by Ronald Thompson 1F
Sun Oct 21, 2018 8:33 pm
Forum: Properties of Electrons
Topic: Calculate energy required to remove an electron
Replies: 6
Views: 2098

Re: Calculate energy required to remove an electron

10^5? I thought you would just convert from KJ to J?
by Ronald Thompson 1F
Sun Oct 21, 2018 8:30 pm
Forum: Photoelectric Effect
Topic: Test #2
Replies: 9
Views: 251

Re: Test #2

There's also a list on the 14a quantum world breakdown detailing everything you will need to know how to do for the test.
by Ronald Thompson 1F
Sun Oct 21, 2018 8:28 pm
Forum: Quantum Numbers and The H-Atom
Topic: spin magnetic quantum number
Replies: 3
Views: 60

Re: spin magnetic quantum number

I believe it is because the spin quantum number has a magnitude of 1/2 in either a positive or negative direction.
by Ronald Thompson 1F
Sat Oct 13, 2018 3:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Required knowledge for test/midterm [ENDORSED]
Replies: 13
Views: 327

Re: Required knowledge for test/midterm [ENDORSED]

On his site I believe he has the sheet with all the equations he will give. To play it safe, if it isn't on the sheet you may want to try and remember it.
by Ronald Thompson 1F
Sat Oct 13, 2018 3:40 pm
Forum: DeBroglie Equation
Topic: De Broglie wavelength - when can it be seen
Replies: 5
Views: 62

Re: De Broglie wavelength - when can it be seen

In class he used an example where the wavelength was measured at 1.64 x 10^-38m which is unmeasurable,
However an example with a wavelength of 1.4 x 10^-10m was
by Ronald Thompson 1F
Sat Oct 13, 2018 3:37 pm
Forum: DeBroglie Equation
Topic: De Broglie wavelength - when can it be seen
Replies: 5
Views: 62

Re: De Broglie wavelength - when can it be seen

I believe he was reffering to measurable wavelike properties. If the calculated wavelength could be experimentally seen in a lab.
by Ronald Thompson 1F
Sat Oct 13, 2018 3:29 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity and Dilution
Replies: 10
Views: 2302

Re: Molarity and Dilution

If done correctly, should I have gotten 5.92?
I also was not entirely sure how to implement Mi x Vi = Mf x Vf
by Ronald Thompson 1F
Sun Oct 07, 2018 3:49 pm
Forum: Limiting Reactant Calculations
Topic: Limiting reagents
Replies: 12
Views: 200

Re: Limiting reagents

Yes there can be more than one depending on each step of the reaction
by Ronald Thompson 1F
Sun Oct 07, 2018 3:46 pm
Forum: Empirical & Molecular Formulas
Topic: When to double moles
Replies: 13
Views: 241

Re: When to double moles

Divide by the smallest value, then usually the decimals are close enough to whole numbers that it is best to just round. There are special cases however
by Ronald Thompson 1F
Thu Oct 04, 2018 12:03 pm
Forum: Empirical & Molecular Formulas
Topic: Converting from Molecular to Empirical Formulas
Replies: 2
Views: 112

Re: Converting from Molecular to Empirical Formulas

Yes that is the way to go. However, if in a problem the molecular formula cannot be reduced then that is also the empirical formula.

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