Search found 79 matches

by Leslie Almaraz 4G
Thu Feb 13, 2020 7:37 pm
Forum: Calculating Work of Expansion
Topic: Work
Replies: 5
Views: 20

Re: Work

Is irreversible always sudden?
by Leslie Almaraz 4G
Thu Feb 13, 2020 7:36 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: C in nCv ln (T2/T1)
Replies: 8
Views: 34

Re: C in nCv ln (T2/T1)

there is also a different way to find Cv and Cp for mono and diatomic molecules.
by Leslie Almaraz 4G
Thu Feb 13, 2020 7:36 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: C in nCv ln (T2/T1)
Replies: 8
Views: 34

Re: C in nCv ln (T2/T1)

this is the heat capacity of the system at constant volume
by Leslie Almaraz 4G
Thu Feb 13, 2020 7:35 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isobaric systems
Replies: 16
Views: 34

Re: Isobaric systems

What about an adiabatic system? is there a different equation for that?
by Leslie Almaraz 4G
Thu Feb 13, 2020 7:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm grading
Replies: 8
Views: 70

Re: Midterm grading

I also know that the 1 o-clock lecture and the 3 o-clock lecture are going to have combined grading because there is only one TA for the last lecture and it wouldn't be fair for her to have to grade all of them.
by Leslie Almaraz 4G
Fri Feb 07, 2020 5:56 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: Boltzmann Equation
Replies: 2
Views: 12

Boltzmann Equation

Is there several versions of the kb constant that can be used in the equation?
by Leslie Almaraz 4G
Fri Feb 07, 2020 5:54 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated vs Closed [ENDORSED]
Replies: 34
Views: 120

Re: Isolated vs Closed [ENDORSED]

would this change the dynamics of the system?
by Leslie Almaraz 4G
Fri Feb 07, 2020 5:53 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Equation
Replies: 3
Views: 22

Equation

Can we always replace the q,rev with the change in enthalpy?
by Leslie Almaraz 4G
Fri Feb 07, 2020 5:52 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: negative Delta U
Replies: 5
Views: 16

Re: negative Delta U

are there any other cases where the change in internal energy will be negative?
by Leslie Almaraz 4G
Fri Feb 07, 2020 5:50 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Equations
Replies: 3
Views: 14

Equations

Is there a way to remember all the equations for entropy and the conditions they satisfy?
by Leslie Almaraz 4G
Fri Jan 31, 2020 6:06 pm
Forum: Ideal Gases
Topic: pv=nrt
Replies: 9
Views: 35

pv=nrt

Can there be a change indicated to p, v, r, and t depending on the question?
by Leslie Almaraz 4G
Fri Jan 31, 2020 6:05 pm
Forum: Phase Changes & Related Calculations
Topic: Units
Replies: 16
Views: 52

Re: Units

This is because they are both scaled the same. However, if this is still confusing try just using Kelvin.
by Leslie Almaraz 4G
Fri Jan 31, 2020 6:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess' Law
Replies: 7
Views: 19

Re: Hess' Law

State properties are allowed to be added or subtracted to each other.
by Leslie Almaraz 4G
Fri Jan 31, 2020 6:02 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Max Heat Capacity
Replies: 4
Views: 11

Max Heat Capacity

is there a max heat capacity on a system?
by Leslie Almaraz 4G
Fri Jan 31, 2020 12:31 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Changes
Replies: 17
Views: 43

Phase Changes

phase changes occur at a constant temperature?
by Leslie Almaraz 4G
Thu Jan 23, 2020 11:56 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Ka and Kb
Replies: 10
Views: 27

Ka and Kb

Ka and Kb are only assigned to weak acids and weak bases?
by Leslie Almaraz 4G
Thu Jan 23, 2020 11:55 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Assuming X
Replies: 3
Views: 15

Assuming X

Do you only assume x has a small change if Ka or Kb is less than 10^-3?
by Leslie Almaraz 4G
Thu Jan 23, 2020 11:53 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Partial Pressure
Replies: 5
Views: 18

Partial Pressure

Does increasing the partial pressure of one element, affect the partial pressure of another? Or does this only apply when increasing the overall pressure?
by Leslie Almaraz 4G
Thu Jan 23, 2020 11:50 pm
Forum: Ideal Gases
Topic: R Constant
Replies: 21
Views: 62

R Constant

How do you know which variation of the R constant to use?
by Leslie Almaraz 4G
Thu Jan 16, 2020 10:56 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Changes in K and Q
Replies: 2
Views: 13

Changes in K and Q

I'm still a little confused about K and Q. Does change temperature change K or Q? Does a change in concentration change Q?
by Leslie Almaraz 4G
Thu Jan 16, 2020 10:52 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Checking Answers
Replies: 1
Views: 13

Checking Answers

Is there an easy way to calculate/ tell if you have calculated the wrong answer? or your answer is completely not possible?
by Leslie Almaraz 4G
Thu Jan 16, 2020 10:51 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Tips for Test
Replies: 16
Views: 60

Tips for Test

Any way to study effectively for the test next week? Are we being tested on chemical equilibrium and acids and bases?
by Leslie Almaraz 4G
Thu Jan 16, 2020 10:50 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE tables
Replies: 3
Views: 22

ICE tables

Are there shortcuts that can be applied when using the quadratic equation?
by Leslie Almaraz 4G
Thu Jan 16, 2020 10:50 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Stress
Replies: 4
Views: 24

Stress

What are the different categories of stress that can be applied?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:26 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Value of K
Replies: 4
Views: 26

Value of K

Is there a value that K can not reach? Because I was thinking that electrons can not move faster than the speed of light which limits speed. So is there a threshold that K can not reach?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Unites for K
Replies: 2
Views: 22

Unites for K

Why does K not have any units? I know units matter when plugging it into the equation, but why doesn't it have any units after it is calculated?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Graphing K and Q Values
Replies: 4
Views: 23

Graphing K and Q Values

In high school, I had to draw graphs comparing these values in order to show which is favored. Is this something we are going to have to do?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Comparing K and Q
Replies: 6
Views: 33

Comparing K and Q

When would we have to compare K and Q values to each other? Does this give us information about the reaction as it is happening?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Combining Equations
Replies: 1
Views: 19

Combining Equations

How do you combine two reaction equations together? Are there times where things are going to cancel out?
by Leslie Almaraz 4G
Thu Jan 09, 2020 9:17 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K and Q Values
Replies: 5
Views: 24

K and Q Values

If Q>K, does this mean that the forward reaction is favored and it must continue in the reverse reaction in order to reach equilibrium?
by Leslie Almaraz 4G
Sat Dec 07, 2019 11:15 pm
Forum: Naming
Topic: Memorization
Replies: 4
Views: 57

Re: Memorization

There are some that come out a lot and are very common. those should be easier to memorize.
by Leslie Almaraz 4G
Sat Dec 07, 2019 11:14 pm
Forum: Naming
Topic: (en), (dien), etc.
Replies: 6
Views: 47

Re: (en), (dien), etc.

Just make sure you remember if they have any charge associated with them.
by Leslie Almaraz 4G
Sat Dec 07, 2019 10:24 pm
Forum: Lewis Acids & Bases
Topic: Lewis vs Bronsted
Replies: 7
Views: 50

Re: Lewis vs Bronsted

What about the Arrhenius definition of acids and bases?
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Grades
Replies: 15
Views: 133

Grades

I heard that we only need 250 points in the whole class to pass. Is this true?
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 142
Views: 3677

Re: Advice from a Medical Student - Part II [ENDORSED]

Thank you for sharing your experience! Is there any time where you felt like you were behind others in your class or felt discouraged? I believe this is very common in big school settings.
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:32 pm
Forum: Student Social/Study Group
Topic: Vocabulary
Replies: 2
Views: 30

Vocabulary

Is there any vocabulary we should be familiar with for the final exam?
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:29 pm
Forum: Student Social/Study Group
Topic: Final
Replies: 3
Views: 28

Final

Does anyone know how many questions are going to be on the final? what topics may be emphasized?
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:26 pm
Forum: Student Social/Study Group
Topic: Studying Videos
Replies: 3
Views: 27

Studying Videos

Are there any specific videos online that have helped people study? for quantum, lewis structures, hybridization, shapes, and chemical properties?
by Leslie Almaraz 4G
Sun Dec 01, 2019 9:23 pm
Forum: Student Social/Study Group
Topic: Studying for Final
Replies: 4
Views: 49

Studying for Final

What are some effective ways to study for the final? specific topic to focus on?
by Leslie Almaraz 4G
Sun Nov 24, 2019 6:07 pm
Forum: Naming
Topic: Order in Naming
Replies: 12
Views: 56

Order in Naming

When given the name of the compound, does it matter the order in which you formulate the atomic symbols?
by Leslie Almaraz 4G
Sun Nov 24, 2019 6:04 pm
Forum: Biological Examples
Topic: Final
Replies: 1
Views: 32

Final

Should we know the biological functions of transition metals?
by Leslie Almaraz 4G
Sun Nov 24, 2019 6:02 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Drawing Structures
Replies: 4
Views: 42

Drawing Structures

Will we have to draw the coordination compounds exactly the way they are bonded? as in making Ni bond with O in H2O
by Leslie Almaraz 4G
Sun Nov 24, 2019 5:59 pm
Forum: Naming
Topic: Trans and Cis
Replies: 8
Views: 51

Trans and Cis

Is the only way to determine is a compound is trans- or cis- by the formation of the atoms?
by Leslie Almaraz 4G
Sun Nov 24, 2019 5:52 pm
Forum: Naming
Topic: Oxidation Numbers
Replies: 4
Views: 39

Oxidation Numbers

How do you determine oxidation numbers based on a name? or a compound?
by Leslie Almaraz 4G
Sun Nov 17, 2019 10:54 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: dipole moments
Replies: 11
Views: 53

Re: dipole moments

How do you determine dipole moments? Is it just based on the atoms in the periodic table?
by Leslie Almaraz 4G
Sun Nov 17, 2019 10:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing molecules
Replies: 12
Views: 73

Re: Drawing molecules

You should know the shape of the compound and it relative to the charges of the atoms.
by Leslie Almaraz 4G
Sun Nov 17, 2019 10:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Why is SF4 Polar?
Replies: 6
Views: 25

Re: Why is SF4 Polar?

I think there is a slight charge on each side that makes it polar.
by Leslie Almaraz 4G
Sun Nov 17, 2019 10:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Notation
Replies: 7
Views: 42

Re: VSEPR Notation

There would be no E term in the notation.
by Leslie Almaraz 4G
Mon Nov 11, 2019 12:13 am
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge Equation
Replies: 3
Views: 22

Formal Charge Equation

Is there another way to determine the formal charge of an atom without the equation?
by Leslie Almaraz 4G
Mon Nov 11, 2019 12:12 am
Forum: Formal Charge and Oxidation Numbers
Topic: Determine Formal Charge
Replies: 3
Views: 20

Determine Formal Charge

How do you determine which element is better to have a formal charge in a compound?
by Leslie Almaraz 4G
Mon Nov 11, 2019 12:11 am
Forum: Coordinate Covalent Bonds
Topic: Determining bonds
Replies: 4
Views: 51

Determining bonds

How do you know if two elements form a covalent bond? Is this known through determining if an element is a non metal and a metal?
by Leslie Almaraz 4G
Mon Nov 11, 2019 12:09 am
Forum: Octet Exceptions
Topic: More then 8 electrons
Replies: 5
Views: 45

More then 8 electrons

If an element has more than 8 electron in the outer shell, is this allowed because it has another orbital it can fill?
by Leslie Almaraz 4G
Mon Nov 11, 2019 12:08 am
Forum: Bond Lengths & Energies
Topic: Double and Triple Bonds
Replies: 3
Views: 24

Double and Triple Bonds

Why are triple bonds stronger than double bonds? Does this mean then have a stronger pull to the electrons?
by Leslie Almaraz 4G
Sun Nov 03, 2019 6:45 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic and Covalent Characteristics
Replies: 3
Views: 31

Ionic and Covalent Characteristics

How do we know how much a covalent bond has ionic properties? like to what extent can they have ionic properties?
by Leslie Almaraz 4G
Sun Nov 03, 2019 6:35 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 3
Views: 38

Electron Configurations

What are the rules that electron configurations follow? How do we know if they don't have to follow a certain rule? Do they apply when electrons are in excited states?
by Leslie Almaraz 4G
Sun Nov 03, 2019 6:33 pm
Forum: Trends in The Periodic Table
Topic: Drawing Structures
Replies: 3
Views: 16

Drawing Structures

How do we know that there are several ways to draw a chemical structure?
by Leslie Almaraz 4G
Sun Nov 03, 2019 6:31 pm
Forum: Properties of Light
Topic: Electromagnetic raditation
Replies: 1
Views: 16

Electromagnetic raditation

During the review session, the UA's said that we used c=h/frequency when dealing with electromagnetic radiation. What do they mean?
by Leslie Almaraz 4G
Sun Nov 03, 2019 6:29 pm
Forum: *Shrodinger Equation
Topic: Schrondiger's Equation
Replies: 6
Views: 57

Schrondiger's Equation

Is there any application of this equation we need to know? or is this more of a concept we must understand?
by Leslie Almaraz 4G
Thu Oct 24, 2019 10:11 pm
Forum: Resonance Structures
Topic: Resonance Structures
Replies: 2
Views: 50

Resonance Structures

Are resonance structures just bonds that can be written in different forms because of the ambiguity of the shape?
by Leslie Almaraz 4G
Thu Oct 24, 2019 10:09 pm
Forum: Octet Exceptions
Topic: Electron Configurations
Replies: 3
Views: 56

Electron Configurations

What if an atom is in an excited state and not ground state? Does this change the electron configuration? If so, do the principles and rules change?
by Leslie Almaraz 4G
Thu Oct 24, 2019 10:06 pm
Forum: Ionic & Covalent Bonds
Topic: Electron Affinity
Replies: 5
Views: 44

Electron Affinity

I am still a little confused about what electron affinity is. What I understood from the lecture is that it is the energy that is released when an electron is added to a gas phase atom. How do we know an atom is in gas phase or are all atoms in gas phase?
by Leslie Almaraz 4G
Thu Oct 24, 2019 10:03 pm
Forum: Ionic & Covalent Bonds
Topic: Threshold Energy
Replies: 4
Views: 34

Threshold Energy

Is the threshold energy something that can be calculated or is it a given value that can not be found through an equation?
by Leslie Almaraz 4G
Thu Oct 24, 2019 9:58 pm
Forum: Ionic & Covalent Bonds
Topic: Isoelectronic Atoms
Replies: 6
Views: 54

Isoelectronic Atoms

Are isoelectronic atoms just elements with the same number of electrons?
Is there anything else we should know about these?
by Leslie Almaraz 4G
Tue Oct 15, 2019 8:28 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydbergs Equation
Replies: 3
Views: 37

Rydbergs Equation

I know that Lavelle mentioned that he prefers us to not use the Rydberg equation; however, I wasn't exactly sure why he wants us to use a different equation. Can someone help me out?
by Leslie Almaraz 4G
Tue Oct 15, 2019 8:26 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Quantum Numbers
Replies: 2
Views: 51

Quantum Numbers

What do the 4 quantum numbers represent as in n, l, ml and ms?
by Leslie Almaraz 4G
Tue Oct 15, 2019 8:25 pm
Forum: *Shrodinger Equation
Topic: Schrondiger's Wave Function Equation
Replies: 4
Views: 58

Schrondiger's Wave Function Equation

Lavelle had mentioned that psi represents the height of a wave function at position x, y, and x. While (psi)^2 represents the probability of finding an electron. I wasn't sure what he meant; does he mean it represents the probability of finding an electron in a certain orbital?
by Leslie Almaraz 4G
Tue Oct 15, 2019 8:25 pm
Forum: *Shrodinger Equation
Topic: Schrondiger's Wave Function Equation
Replies: 1
Views: 26

Schrondiger's Wave Function Equation

Lavelle had mentioned that psi represents the height of a wave function at position x, y, and x. While (psi)^2 represents the probability of finding an electron. I wasn't sure what he meant; does he mean it represents the probability of finding an electron in a certain orbital?
by Leslie Almaraz 4G
Tue Oct 15, 2019 8:14 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation
Replies: 17
Views: 107

Re: De Broglie's Equation

De Broglie used light in order to derive the equation. The equation will work for any particle with momentum and it has a wavelength with its properties.
by Leslie Almaraz 4G
Sat Oct 12, 2019 6:19 pm
Forum: DeBroglie Equation
Topic: Circular standing waves
Replies: 4
Views: 25

Re: Circular standing waves

Are you talking about the diffraction waves that were presented at the start of class or the waves that were surrounding the nucleus?
by Leslie Almaraz 4G
Sat Oct 12, 2019 6:16 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation
Replies: 13
Views: 78

Re: De Broglie's Equation

Responding to the person above, for E=hv, the v represents frequency. This is not the same symbol that is used for Debroglie's question which it wavelength= h (plank's constant)/, p (momentum). Momentum is also equal to mass x velocity, which is not the same as the v representing frequency.
by Leslie Almaraz 4G
Sat Oct 12, 2019 6:11 pm
Forum: Properties of Electrons
Topic: Wavelike vs Particle-like Behavior
Replies: 6
Views: 56

Re: Wavelike vs Particle-like Behavior

Lavelle has mentioned that an electron was wavelike behavior when it is able to travel through a slight and it is present in more than one place so it looks like a wave.
by Leslie Almaraz 4G
Sat Oct 12, 2019 6:06 pm
Forum: Photoelectric Effect
Topic: Wave-like Properties
Replies: 4
Views: 46

Re: Wave-like Properties

According to DeBroglies equation, the higher the mass, the smaller the wavelength and are more likely to have particle-like behavior.
by Leslie Almaraz 4G
Sat Oct 12, 2019 6:04 pm
Forum: Photoelectric Effect
Topic: Mass of Electron
Replies: 6
Views: 46

Re: Mass of Electron

Electrons have a very small mass. Most of the mass of an element depends on the mass of protons and neutrons. The approximate mass of an electron is about 9.10938 x 10^-28 g.
by Leslie Almaraz 4G
Sat Oct 05, 2019 9:44 pm
Forum: *Shrodinger Equation
Topic: What does this even mean?
Replies: 4
Views: 543

Re: What does this even mean?

The purpose of Schondigers equation is to allow us to find how states evolve over time. However, this will not be emphasized in this course.
by Leslie Almaraz 4G
Sat Oct 05, 2019 9:40 pm
Forum: Significant Figures
Topic: Clarification with sig figs
Replies: 6
Views: 64

Re: Clarification with sig figs

It is best to hold onto a couple significant figures until the end. This will make sure your answer is the most accurate with the given quantities in the question.
by Leslie Almaraz 4G
Sat Oct 05, 2019 9:39 pm
Forum: SI Units, Unit Conversions
Topic: Unit Conversion
Replies: 5
Views: 43

Re: Unit Conversion

In order to easier remember how to convert, just think if the prefixes and number. For example, kilo would be 1000. Centi would be 1/100. Mili would be 1/1000.
by Leslie Almaraz 4G
Sat Oct 05, 2019 9:33 pm
Forum: Empirical & Molecular Formulas
Topic: Fundamental m.19
Replies: 3
Views: 42

Re: Fundamental m.19

Here are some of the steps you should take in order to get to your answer: 1. convert grams of CO2, H2O, and N2 to moles in order to have a universal unit you could compare the elements to. 2. break down the elements to the grams that were given in the question, break CO2 down by the mass given 0.68...
by Leslie Almaraz 4G
Sat Oct 05, 2019 9:16 pm
Forum: Quantum Numbers and The H-Atom
Topic: HW question 2.17 [ENDORSED]
Replies: 4
Views: 685

Re: HW question 2.17 [ENDORSED]

The quantum number of l corresponds to the shape of the orbital. Quantum numbers specify specific spacial qualities of an orbital. l=0 corresponds to the s orbital. While l=1 corresponds to the p-orbital, l=2 corresponds to the d orbital and l=3 corresponds to the f-orbital.

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