Search found 79 matches

by SimranSangha4I
Sun Feb 16, 2020 9:36 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Work
Replies: 10
Views: 25

Re: Work

Positive would occur when the work is actually able to be done. When there is work being done on the system itself, the work would actually be negative.
by SimranSangha4I
Sun Feb 16, 2020 9:29 pm
Forum: General Science Questions
Topic: Studying
Replies: 10
Views: 22

Re: Studying

I think the best things you can do for 14b are office hours, review sessions, and practicing problems like the ones found in our assigned homework problems for the different outlines we cover.
by SimranSangha4I
Sun Feb 16, 2020 9:19 pm
Forum: Balancing Redox Reactions
Topic: Redox Reactions
Replies: 12
Views: 21

Re: Redox Reactions

In an oxidation reaction, an electron is lost. In a reduction reaction, an electron is gained.
by SimranSangha4I
Sun Feb 16, 2020 8:50 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Why are exothermic reactions generally spontaneous?
Replies: 15
Views: 76

Re: Why are exothermic reactions generally spontaneous?

LBacker_2E wrote:Is this related to the relationship between ∆G and the direction of a spontaneous reaction? Does a spontaneous reaction have a -∆G and proceed in the forward direction?

Yes, when a reaction is spontaneous, it has a negative delta G
by SimranSangha4I
Sun Feb 16, 2020 7:01 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Volume of the Universe
Replies: 4
Views: 18

Re: Volume of the Universe

Yes! That sounds right since the heat of the universe doesn't change.
by SimranSangha4I
Sun Feb 09, 2020 3:13 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: solids and liquids in the rxn quotient
Replies: 8
Views: 28

Re: solids and liquids in the rxn quotient

Yes, exclude the two when calculating the Q or K.
by SimranSangha4I
Sun Feb 09, 2020 3:11 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Cm
Replies: 4
Views: 13

Re: Cm

Cm would be the molar specific heat for the equation.
by SimranSangha4I
Sun Feb 09, 2020 2:59 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: delta U
Replies: 8
Views: 30

Re: delta U

Within an adiabetic system, delta U would equal work because there is no heat transfer that can take place within the equation Delta U=q=w.
by SimranSangha4I
Sun Feb 09, 2020 2:37 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: extensive property
Replies: 12
Views: 46

Re: extensive property

The concept of an extensive property would be things that alter depending on the amount of material.
by SimranSangha4I
Sun Feb 09, 2020 2:35 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Topics on the Midterm
Replies: 22
Views: 85

Re: Topics on the Midterm

All material from outlines 1-4!
by SimranSangha4I
Sun Feb 02, 2020 7:30 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Moles
Replies: 8
Views: 24

Re: Moles

It's primarily focused on gas molecules and their coefficients.
by SimranSangha4I
Sun Feb 02, 2020 7:28 pm
Forum: *Organic Reaction Mechanisms in General
Topic: K meaning
Replies: 4
Views: 12

Re: K meaning

It's just the constant 1.380649x10^-23 J/K, hope that helped!
by SimranSangha4I
Sun Feb 02, 2020 7:24 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: isolated system
Replies: 13
Views: 26

Re: isolated system

A pretty common example you can probably relate to would be a really good thermos or even a hydroflask!
by SimranSangha4I
Sun Feb 02, 2020 7:22 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Definition of First Law
Replies: 9
Views: 17

Re: Definition of First Law

The first law of Thermodynamics states that heat is energy and in relation, cannot be created or destroyed.
by SimranSangha4I
Sun Feb 02, 2020 7:20 pm
Forum: Calculating Work of Expansion
Topic: Work
Replies: 4
Views: 14

Re: Work

Work can be defined as the product of the force used to move an object times the distance the object is moved.
by SimranSangha4I
Sun Jan 26, 2020 11:42 pm
Forum: Student Social/Study Group
Topic: Office Hours
Replies: 5
Views: 37

Re: Office Hours

It depends on the UA normally, some provide worksheets while others don't!
by SimranSangha4I
Sun Jan 26, 2020 11:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: checking approximation
Replies: 4
Views: 12

Re: checking approximation

Yes, if the answer comes back more than 5% you should go back and use the quadratic formula.
by SimranSangha4I
Sun Jan 26, 2020 11:37 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Heat Capacity of Water
Replies: 6
Views: 248

Re: Heat Capacity of Water

It would be proportional so the change would essentially be the same.
by SimranSangha4I
Sun Jan 26, 2020 11:29 pm
Forum: Phase Changes & Related Calculations
Topic: State functions
Replies: 3
Views: 17

Re: State functions

A state function does not depend on the path taken to reach that specific value, so heat would not be considered a state function.
by SimranSangha4I
Sun Jan 26, 2020 11:01 pm
Forum: Phase Changes & Related Calculations
Topic: Phase changes
Replies: 8
Views: 31

Re: Phase changes

The phase would require a certain amount of energy to change. Within enthalpy, the phase change needs to be combined with the bond enthalpy.
by SimranSangha4I
Sun Jan 19, 2020 10:59 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Adding a molecule thats not in reaction
Replies: 2
Views: 8

Re: Adding a molecule thats not in reaction

It actually wouldn't affect the equilibrium because it does not affect the concentrations.
by SimranSangha4I
Sun Jan 19, 2020 10:55 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: H20 in the ICE table
Replies: 26
Views: 91

Re: H20 in the ICE table

Yep! Leave out H2O, solids, and other liquids.
by SimranSangha4I
Sun Jan 19, 2020 10:40 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Effect of increasing pressure on reactions
Replies: 6
Views: 18

Re: Effect of increasing pressure on reactions

The reaction would end up shifting towards the side in which there are fewer mole because that would effect the equilibrium!
by SimranSangha4I
Sun Jan 19, 2020 10:34 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: pKa
Replies: 13
Views: 23

Re: pKa

The lower the pKa, the stronger the acid
by SimranSangha4I
Sun Jan 19, 2020 10:30 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ICE Tables
Replies: 13
Views: 35

Re: ICE Tables

H2O would have the concentration of 1 as well as it is normally in excess.
by SimranSangha4I
Sun Jan 12, 2020 11:53 pm
Forum: Ideal Gases
Topic: Q vs. K
Replies: 10
Views: 25

Re: Q vs. K

Q is the constant through the entire equilibrium while K is the constant at equilibrium!
by SimranSangha4I
Sun Jan 12, 2020 11:30 pm
Forum: Ideal Gases
Topic: K and Units
Replies: 7
Views: 21

Re: K and Units

You shouldn't use units when calculating K as a constant but for molarity, you should use moles per liter (moles/L).
by SimranSangha4I
Sun Jan 12, 2020 11:20 pm
Forum: Ideal Gases
Topic: Kc and Kp
Replies: 8
Views: 19

Re: Kc and Kp

Kc is often the equilibrium constant found in concentrations while Kp deals with the partial pressures.
by SimranSangha4I
Sun Jan 12, 2020 11:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K
Replies: 10
Views: 40

Re: K

Kp is used within partial pressures while Kc is the constant within concentrations.
by SimranSangha4I
Sun Jan 12, 2020 11:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw for next week
Replies: 19
Views: 65

Re: Hw for next week

I think as long we continue to cover equilibrium during lecture this week it should be fine, but I also believe you should contact your TA!
by SimranSangha4I
Sun Dec 08, 2019 11:42 pm
Forum: General Science Questions
Topic: Coordination Compounds
Replies: 7
Views: 84

Re: Coordination Compounds

Yes! It assists with naming while showing the the biological significance, like cisplatin.
by SimranSangha4I
Sun Dec 08, 2019 11:40 pm
Forum: Lewis Structures
Topic: Cl as a central atom
Replies: 3
Views: 51

Re: Cl as a central atom

I think chlorine can be an exception to the octet rule as long as the charge is 0
by SimranSangha4I
Sun Dec 08, 2019 11:38 pm
Forum: Sigma & Pi Bonds
Topic: Sigma Vs Pi
Replies: 10
Views: 65

Re: Sigma Vs Pi

I think the main thing you need to recognize is when they occur so sigma would be a single bond, a double would be both a sigma and pi bond, and a triple bond would be two pi bonds and one sigma bond.
by SimranSangha4I
Sun Dec 08, 2019 11:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Final tips
Replies: 19
Views: 149

Re: Final tips

I know it's fairly late for this advice now but I think that one of the best ways to study would have been by doing as many homework problems as possible from the many sections, reading the text book, and looking over the past tests that we have been given!
by SimranSangha4I
Sun Dec 08, 2019 11:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: bent v. angular
Replies: 20
Views: 108

Re: bent v. angular

Bent and angular are the same thing!
by SimranSangha4I
Sun Dec 01, 2019 8:53 pm
Forum: Hybridization
Topic: Hybridization
Replies: 7
Views: 60

Re: Hybridization

That's just about it! The homework problems really help with practicing those skills.
by SimranSangha4I
Sun Dec 01, 2019 8:52 pm
Forum: Hybridization
Topic: Hybridization (Lone Pairs)
Replies: 4
Views: 34

Re: Hybridization (Lone Pairs)

Yes! The lone pairs are still considered sites for bonding to occur
by SimranSangha4I
Sun Dec 01, 2019 8:50 pm
Forum: Conjugate Acids & Bases
Topic: Water as an Acid/Base
Replies: 20
Views: 417

Re: Water as an Acid/Base

It can actually act as both, it really depends on the situation.
by SimranSangha4I
Sun Dec 01, 2019 8:46 pm
Forum: Naming
Topic: Final Exam?
Replies: 20
Views: 133

Re: Final Exam?

Definitely cumulative! Best way to study in my opinion is to go over the assigned problems and previous test questions!
by SimranSangha4I
Sun Dec 01, 2019 8:44 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: pH scale
Replies: 12
Views: 59

Re: pH scale

The 0-14 primarily acts as a scale for most solutions.
by SimranSangha4I
Sun Nov 24, 2019 7:47 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 5
Views: 20

Re: Ligands

Ligands are ions that bond with central metal atoms.
by SimranSangha4I
Sun Nov 24, 2019 7:27 pm
Forum: Sigma & Pi Bonds
Topic: Sigma and Pi Bonds
Replies: 7
Views: 40

Re: Sigma and Pi Bonds

Sigma is a single bond (primarily the 'inital' bond) while a double bond would be the 'next' bond, being one sigma and one pi bond.
by SimranSangha4I
Sun Nov 24, 2019 7:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent vs linear
Replies: 56
Views: 300

Re: Bent vs linear

linear wouldn't contain a lone pair while bent would.
by SimranSangha4I
Sun Nov 24, 2019 7:06 pm
Forum: Hybridization
Topic: Sigma and Pi bonds
Replies: 13
Views: 57

Re: Sigma and Pi bonds

you need to make sure that you just label the bond sigma or pi.
by SimranSangha4I
Sun Nov 24, 2019 6:56 pm
Forum: Hybridization
Topic: d-orbitals
Replies: 7
Views: 38

Re: d-orbitals

Yes they do! They get involved during the hybridization of period 3!
by SimranSangha4I
Sun Nov 17, 2019 11:48 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Van Der Waals Interaction
Replies: 11
Views: 52

Re: Van Der Waals Interaction

Yes, every molecule experiences these forces, the strongest to weakest would be as follows: ion-dipole, hydrogen bonds, dipole-dipole, and lastly, Van Der Waals.
by SimranSangha4I
Sun Nov 17, 2019 11:39 am
Forum: Ionic & Covalent Bonds
Topic: Bonds strength
Replies: 4
Views: 39

Re: Bonds strength

Since there is still repulsion present between the bonds, the double bond isn't double.
by SimranSangha4I
Sun Nov 17, 2019 11:37 am
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Model
Replies: 5
Views: 25

Re: VSEPR Model

the electron arrangement is primarily the placement, the molecular shape would be a 3D representation of where the electron density is actually placed in relation to the electron-electron repulsion.
by SimranSangha4I
Sun Nov 17, 2019 11:29 am
Forum: Determining Molecular Shape (VSEPR)
Topic: seesaw
Replies: 9
Views: 65

Re: seesaw

There wound be four bonding pairs and one lone pair!
by SimranSangha4I
Sun Nov 17, 2019 11:16 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Hydrogen Bonding
Replies: 6
Views: 32

Re: Hydrogen Bonding

Yes, it's a type of dipole-dipole but stronger than the normal dipole-dipole.
by SimranSangha4I
Sun Nov 10, 2019 10:28 pm
Forum: Octet Exceptions
Topic: electron number in octet
Replies: 8
Views: 58

Re: electron number in octet

for the most part, it depends on what type of element it is!
by SimranSangha4I
Sun Nov 10, 2019 10:22 pm
Forum: Dipole Moments
Topic: Dipole
Replies: 1
Views: 18

Re: Dipole

I believe we'd need to know what they are and under what circumstances they occur since we will probably have to identify IM forces in assigned problems, hope that helped!
by SimranSangha4I
Sun Nov 10, 2019 10:16 pm
Forum: General Science Questions
Topic: Test 2
Replies: 20
Views: 142

Re: Test 2

I'd imagine that it only cover topics after the midterm! :)
by SimranSangha4I
Sun Nov 10, 2019 10:15 pm
Forum: Trends in The Periodic Table
Topic: Atomic Radius
Replies: 9
Views: 60

Re: Atomic Radius

The trend would demonstrate that from right to left and top to bottom, the atomic radius would increase.
by SimranSangha4I
Sun Nov 10, 2019 10:12 pm
Forum: Lewis Structures
Topic: Midterm grades
Replies: 26
Views: 249

Re: Midterm grades

Most likely, it'll be this week since there are so many of us!
by SimranSangha4I
Sun Nov 03, 2019 7:17 pm
Forum: Lewis Acids & Bases
Topic: diff b/w lewis acid and base
Replies: 12
Views: 82

Re: diff b/w lewis acid and base

Acids accept while the bases donate electron pairs!
by SimranSangha4I
Sun Nov 03, 2019 7:15 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: 1B.26
Replies: 4
Views: 55

Re: 1B.26

it would be between -5 m/s to 5 m/s, so it'd be about 10m/s.
by SimranSangha4I
Sun Nov 03, 2019 10:57 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: isoelectronic definition
Replies: 7
Views: 44

Re: isoelectronic definition

A good place to read about it is 1F.3 but it essentially means when atoms have the same amount of electrons! Hope that helped!
by SimranSangha4I
Sun Nov 03, 2019 10:47 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Cu and Cr
Replies: 11
Views: 54

Re: Cu and Cr

Yes, the trend would continue!
by SimranSangha4I
Sun Nov 03, 2019 9:42 am
Forum: SI Units, Unit Conversions
Topic: midterm 1
Replies: 5
Views: 64

Re: midterm 1

It'll include everything from outlines 1 and 2, while including most of 3
by SimranSangha4I
Sun Oct 27, 2019 11:12 pm
Forum: Ionic & Covalent Bonds
Topic: Covalent Bonds
Replies: 14
Views: 96

Re: Covalent Bonds

covalent bonds are only formed between two non-metals!
by SimranSangha4I
Sun Oct 27, 2019 10:45 pm
Forum: *Shrodinger Equation
Topic: Review
Replies: 4
Views: 71

Re: Review

I haven't been to every single one but I believe most of the sessions is the UA/TA going over the basics and then progressing into what we're covering in the actual class. I have heard that of some of the other students on occasion have been given worksheets.
by SimranSangha4I
Sun Oct 27, 2019 10:20 pm
Forum: Lewis Structures
Topic: Choosing the central atom
Replies: 16
Views: 72

Re: Choosing the central atom

When picking a central atom, it's most common to pick the one with the lowest ionization energy.
by SimranSangha4I
Sun Oct 27, 2019 10:13 pm
Forum: Ionic & Covalent Bonds
Topic: electron configuration order
Replies: 6
Views: 58

Re: electron configuration order

5s!
by SimranSangha4I
Sun Oct 27, 2019 10:05 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons
Replies: 16
Views: 110

Re: Valence Electrons

For the blocks, the amount of valence electrons is based off of the group, or much rather the last shell's electron amount.
by SimranSangha4I
Sun Oct 20, 2019 2:58 pm
Forum: Administrative Questions and Class Announcements
Topic: Homework for week 4
Replies: 3
Views: 24

Re: Homework for week 4

You can either do Chemical Bonding or Quantum problems for week 4!
by SimranSangha4I
Sun Oct 20, 2019 2:57 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7838
Views: 1089301

Re: Post All Chemistry Jokes Here

What happens when electrons lose their energy?
A: They get Bohr'ed
by SimranSangha4I
Sun Oct 20, 2019 2:54 pm
Forum: Properties of Light
Topic: Modules
Replies: 5
Views: 53

Re: Modules

Honestly, I'm not sure because I think everything he's posted has been uploaded at once. Hopefully he will be posting some more modules.
by SimranSangha4I
Sun Oct 20, 2019 2:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: how to prepare
Replies: 22
Views: 143

Re: how to prepare

Personally, I go to the tutoring sessions and the step up sessions up in Covel! They really do help since they hit just about everything we cover in lecture, just in a slower and more explained way. Another thing I would recommend is getting some extra help from your TA at office hours. Good luck!
by SimranSangha4I
Sun Oct 20, 2019 2:36 pm
Forum: Properties of Light
Topic: Unit for Wavelength
Replies: 34
Views: 165

Re: Unit for Wavelength

The wavelength measures the distance between each wave! So the unit for wavelength would be in meters (m) but we also frequently use nanometers (nm). The conversion would be 1nm= 10^-9 m!
by SimranSangha4I
Sun Oct 13, 2019 2:32 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: First Test Result
Replies: 5
Views: 77

Re: First Test Result

it'll probably be in discussion this week!
by SimranSangha4I
Sun Oct 13, 2019 2:28 pm
Forum: Molarity, Solutions, Dilutions
Topic: Dilutions
Replies: 10
Views: 117

Re: Dilutions

I would use M (initial) X Volume (initial) = M (final) X Volume (final)
by SimranSangha4I
Sun Oct 13, 2019 2:05 pm
Forum: Properties of Light
Topic: e=hv
Replies: 7
Views: 73

Re: e=hv

e=hv references the energy per photon and it was derived from the photoelectric effect.
by SimranSangha4I
Sun Oct 13, 2019 2:00 pm
Forum: Properties of Light
Topic: EM waves
Replies: 3
Views: 20

Re: EM waves

It's the disturbance.
by SimranSangha4I
Sun Oct 06, 2019 9:54 pm
Forum: Empirical & Molecular Formulas
Topic: empirical and molecular formulas
Replies: 7
Views: 55

Re: empirical and molecular formulas

Yes, it can! Since molecular formula tells you the amount of molecules in a compound and the empirical formula tells you the simplest ratio in a compound, if a compound's molecular formula cannot be reduced anymore, the empirical formula would be able to be the same as the molecular.
by SimranSangha4I
Sun Oct 06, 2019 9:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Specific type of calculator for tests?
Replies: 6
Views: 72

Re: Specific type of calculator for tests?

A scientific calculator should work well!
by SimranSangha4I
Sun Oct 06, 2019 9:30 pm
Forum: Limiting Reactant Calculations
Topic: limiting reactant
Replies: 9
Views: 73

Re: limiting reactant

Not necessarily, but the reactant with the smallest number of moles can be the limiting reactant if all reactants within the chemical equation react in a mole ratio of one to one.
by SimranSangha4I
Sun Oct 06, 2019 7:56 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Theoretical vs. Actual Yield
Replies: 38
Views: 480

Re: Theoretical vs. Actual Yield

Well, actual yield is the mass of the product that was actually obtained while theoretical is just going to be what is expected, without any complications or opportunities for the mass of the product to decrease. So normally, the actual yield will always be less than the calculated theoretical due t...
by SimranSangha4I
Sun Oct 06, 2019 11:23 am
Forum: Empirical & Molecular Formulas
Topic: Polyatomic Ions/Naming Compounds
Replies: 6
Views: 132

Re: Polyatomic Ions/Naming Compounds

The way I had memorized them in high school was organizing them by the suffixes of the compounds like -ite, -ate, and -ide! (i.e. AgNO3 - Silver nitrate) Hope this helped!

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