Search found 50 matches

by 605395381
Sat Mar 14, 2020 3:53 pm
Forum: First Order Reactions
Topic: First order rxns
Replies: 6
Views: 21

Re: First order rxns

you can look at the rate law given or graph
by 605395381
Sat Mar 14, 2020 3:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 12
Views: 167

Re: Final

I think electronically, probably scan and submit?
by 605395381
Sat Mar 14, 2020 3:49 pm
Forum: Administrative Questions and Class Announcements
Topic: take home FINAL DEADLINE
Replies: 15
Views: 232

Re: take home FINAL DEADLINE

Honestly, I'm still waiting for the email that he said he will send today. I understand that he has been busy, but hopefully itll come soon because im getting anxious
by 605395381
Sat Mar 14, 2020 3:46 pm
Forum: Administrative Questions and Class Announcements
Topic: "Open Book" Final?
Replies: 30
Views: 412

Re: "Open Book" Final?

im thinking textbook, lecture notes, discussion notes
by 605395381
Sat Mar 14, 2020 3:44 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Activation energy
Replies: 7
Views: 31

Re: Activation energy

joules or kilojoules
by 605395381
Sat Mar 14, 2020 3:41 pm
Forum: *Nucleophiles
Topic: FInal
Replies: 6
Views: 72

Re: FInal

I think it would be best to
by 605395381
Sat Mar 14, 2020 3:40 pm
Forum: Balancing Redox Reactions
Topic: Oxidation number
Replies: 12
Views: 78

Re: Oxidation number

determining the oxidation number determines whether it is oxidizing or reducing. when balancing half reactions, it will show how many electrons will be lost or gained
by 605395381
Sat Mar 14, 2020 3:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 11
Views: 62

Re: Cell Diagram

yes, it is probably the most common
by 605395381
Sat Mar 14, 2020 3:35 pm
Forum: Zero Order Reactions
Topic: 0 order
Replies: 6
Views: 35

Re: 0 order

Concentration does not affect rate in zero order reaction
by 605395381
Sat Mar 14, 2020 3:34 pm
Forum: Administrative Questions and Class Announcements
Topic: final tech malfunctions
Replies: 5
Views: 71

Re: final tech malfunctions

they will probably have us download and print the finals
by 605395381
Sat Mar 14, 2020 3:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Partial Credit
Replies: 8
Views: 93

Re: Partial Credit

you can just an app call genius scan for android users to scan
by 605395381
Sat Mar 14, 2020 3:31 pm
Forum: Administrative Questions and Class Announcements
Topic: Final- general questions
Replies: 12
Views: 107

Re: Final- general questions

wait so is the exam three hours or will he just post it tomorrow? I just want to know because other professor have given a twenty-four hours limit
by 605395381
Mon Mar 02, 2020 8:05 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: Determining n
Replies: 5
Views: 56

Re: Determining n

n is the number of moles of e in the reaction that is being transferred
by 605395381
Mon Mar 02, 2020 8:04 am
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Kinetics in Test 2?
Replies: 13
Views: 103

Re: Kinetics in Test 2?

no, that is the only topic that will not be tested before the final
by 605395381
Mon Mar 02, 2020 8:03 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Kelvin or Celsius?
Replies: 47
Views: 497

Re: Kelvin or Celsius?

kelvin, just make sure the units for R is the same
by 605395381
Mon Mar 02, 2020 8:02 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: k
Replies: 10
Views: 86

Re: k

k is unit-less because it is a ration of concentrations of products and reactants
by 605395381
Mon Mar 02, 2020 8:00 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: predicting is metals will dissolve
Replies: 3
Views: 30

Re: predicting is metals will dissolve

identify delta g- spontaneous--> will dissolves
not spontaneous--> will not dissolves
by 605395381
Mon Mar 02, 2020 7:58 am
Forum: Balancing Redox Reactions
Topic: Anode and Xathod
Replies: 9
Views: 51

Re: Anode and Xathod

on the left side, oxidation is taking place at the anode- so the rod itself is giving off electrons which then travel to the right side, the cathode to binds with free floating molecules waiting to be reduced.
by 605395381
Mon Mar 02, 2020 7:56 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Voltage Signs for Oxidation Reactions
Replies: 2
Views: 26

Re: Voltage Signs for Oxidation Reactions

yes, just change the sign of the given value
by 605395381
Mon Mar 02, 2020 7:55 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: salt bridge
Replies: 4
Views: 29

Re: salt bridge

the salt bridge is needed to maintain the charge balance of the two solutions as the electrons move from the anode to cathode, it leaves the left-side solution positively charged, therefore the ions from the salt bridge enters to to stabilize the charge difference
by 605395381
Mon Mar 02, 2020 7:52 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: work
Replies: 7
Views: 54

Re: work

delta g is equal to the max non-expansion work (at constant p and t)
by 605395381
Mon Mar 02, 2020 7:48 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Voltage
Replies: 6
Views: 33

Re: Voltage

the sign is used more to keep track, so its a good idea to use it as it minimizes your chances of making a mistake
by 605395381
Mon Mar 02, 2020 7:46 am
Forum: Method of Initial Rates (To Determine n and k)
Topic: factors that affect k
Replies: 8
Views: 122

Re: factors that affect k

the equilibrium changes in responds to change in temperature
by 605395381
Mon Mar 02, 2020 7:38 am
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Moles in nernst
Replies: 4
Views: 32

Re: Moles in nernst

n refers to the moles of electrons that is being transfered
by 605395381
Mon Mar 02, 2020 7:36 am
Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
Topic: biological examples
Replies: 3
Views: 55

Re: biological examples

not sure if this answers your question, but electricity is used in the body so now physicians use EEG to detect abnormalities
by 605395381
Mon Mar 02, 2020 7:32 am
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Study Advice
Replies: 73
Views: 3491

Re: Study Advice

personally, lyndon's reviews are great for me.
by 605395381
Wed Feb 05, 2020 5:31 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: heat given off by rxn = - heat absorbed by solution
Replies: 6
Views: 42

Re: heat given off by rxn = - heat absorbed by solution

I don't think it is important to memorize that equation. As long as you understand that losing heat is neg and absorbing is pos. and the amount of energy lost/gain by the system is equal to the amount gain/lost by the surrounding.
by 605395381
Wed Feb 05, 2020 5:19 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: enthalpy
Replies: 7
Views: 51

Re: enthalpy

Enthalpy is the amount of heat released or absorbed when the rxn is at a constant pressure
by 605395381
Wed Feb 05, 2020 5:16 pm
Forum: Calculating Work of Expansion
Topic: Kelvin vs Celsius
Replies: 5
Views: 30

Re: Kelvin vs Celsius

It would depends on the problems, one of the best thing to do is check the units of a given constant in that problem.
by 605395381
Wed Feb 05, 2020 5:15 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: defintion
Replies: 6
Views: 45

Re: defintion

Internal energy is the total energy found in a system which is, as defined by the equation, the sum of heat plus work (a form of energy)
by 605395381
Wed Feb 05, 2020 5:09 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: calculating q: moles or mass?
Replies: 2
Views: 14

Re: calculating q: moles or mass?

It can be either one depending on the units of the C that you use
by 605395381
Wed Feb 05, 2020 5:05 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Cp and Cv
Replies: 10
Views: 62

Re: Cp and Cv

I don't think we have to memorize them
by 605395381
Sun Jan 26, 2020 9:23 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Using Kc Vs Kp
Replies: 18
Views: 144

Re: Using Kc Vs Kp

It would depends on the chemical equation given
by 605395381
Sun Jan 26, 2020 9:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kp to Kc
Replies: 11
Views: 47

Re: Kp to Kc

yes it is included in the calculation as long as it is not in pure liquid form
by 605395381
Sun Jan 26, 2020 9:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Percent Ionization
Replies: 12
Views: 63

Re: Percent Ionization

Percent Ionization = ([H3O+]/[initial concentration of acid]) x 100
by 605395381
Sun Jan 26, 2020 9:18 pm
Forum: Calculating Work of Expansion
Topic: Work Units
Replies: 3
Views: 17

Re: Work Units

I believe that it is measured in joules
by 605395381
Sun Jan 26, 2020 9:11 pm
Forum: Phase Changes & Related Calculations
Topic: enthalpy of phase changes
Replies: 8
Views: 44

Re: enthalpy of phase changes

I do not believe that enthalpy values will ever be negative
by 605395381
Sun Jan 26, 2020 9:10 pm
Forum: Phase Changes & Related Calculations
Topic: Physical or Phase Changes
Replies: 7
Views: 38

Re: Physical or Phase Changes

Following the examples that have already been given- those values will most likely be given to us
by 605395381
Sat Jan 18, 2020 12:30 pm
Forum: Administrative Questions and Class Announcements
Topic: How was my Friday class/lecture?
Replies: 4
Views: 58

Re: How was my Friday class/lecture?

We went over some examples as practice. No new material
by 605395381
Sat Jan 18, 2020 12:28 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Partial Pressure
Replies: 19
Views: 92

Re: Partial Pressure

Partial pressure (from what I have seen) is usually given in the problem. But I do not doubt that we might have to solve for Partial Pressure in some cases.
by 605395381
Sat Jan 18, 2020 12:26 pm
Forum: Ideal Gases
Topic: Topics on Test 1
Replies: 37
Views: 268

Re: Topics on Test 1

Test one will be covering Chemical Equilibrium and Acid&Base Equilibria
by 605395381
Sat Jan 18, 2020 12:25 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q < K
Replies: 16
Views: 79

Re: Q < K

When Q < K, that means the reaction is not in equilibrium and the reaction is favoring the product side.
by 605395381
Sat Jan 18, 2020 12:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Study Guide Test One
Replies: 17
Views: 128

Re: Study Guide Test One

I do not think that there will be a study guide for test one, but Professor Lavelle said that the extra problems that he put on the outlines are good practice.
by 605395381
Mon Jan 13, 2020 6:24 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 6B.3
Replies: 2
Views: 18

Re: 6B.3

I'm having the same problem. Please help
by 605395381
Mon Jan 13, 2020 6:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Autoprotolysis
Replies: 6
Views: 31

Re: Autoprotolysis

Autoprotolysis can happen with other molecules apart from water molecules, such as ammonia and acetic acid.
by 605395381
Fri Jan 10, 2020 2:48 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Meaning of equilibrium constant
Replies: 5
Views: 55

Re: Meaning of equilibrium constant

When K is between 10^-3 and 10^3, it means that neither the reactants nor the products are favored when the reaction is in equilibrium. You can't necessarily tell which side of the equilibrium has more in concentrations.
by 605395381
Fri Jan 10, 2020 2:43 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Textbook 5H.1 Part 1
Replies: 4
Views: 29

Re: Textbook 5H.1 Part 1

We get the
because when you write out the expression for K. We notice that the exponents (which are the coefficients in the equilibrium equation) are divided by 2. Therefore, in order to keep the two sides equal, we must take the Square root of 41.
by 605395381
Fri Jan 10, 2020 2:29 am
Forum: Ideal Gases
Topic: Ideal Gases
Replies: 7
Views: 149

Re: Ideal Gases

Although gases are never perfectly "ideal". We assume most of the time that gases are ideal because at higher temperature and lower pressure there are not a significant intermolecular forces between the gas molecules. This assumption allows for calculations of other properties of the gases.

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