Search found 51 matches
- Sun Mar 15, 2020 1:22 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Kelvin or Celsius?
- Replies: 86
- Views: 5875
Re: Kelvin or Celsius?
kelvin
- Sun Mar 15, 2020 1:21 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Mnemonic for Oxidation and Reduction
- Replies: 7
- Views: 625
Re: Mnemonic for Oxidation and Reduction
OIL - oxidation is loss
RIG - reduction is gain
RIG - reduction is gain
- Sun Mar 15, 2020 1:19 pm
- Forum: Administrative Questions and Class Announcements
- Topic: 1E Discussion and Electrochem Review Session
- Replies: 2
- Views: 475
Re: 1E Discussion and Electrochem Review Session
These were extremely helpful!
- Sun Mar 15, 2020 1:18 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Saying Thank You to Dr. Lavelle
- Replies: 490
- Views: 573187
Re: Saying Thank You to Dr. Lavelle
Thank you Dr. Lavelle for being such an enthusiastic professor and caring for your students. It truly makes a difference!
- Sun Mar 15, 2020 1:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: ENDGAME Review Session
- Replies: 71
- Views: 5709
Re: ENDGAME Review Session
Thank you!
- Mon Mar 09, 2020 9:23 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: k'
- Replies: 6
- Views: 439
Re: k'
It’s the constant for the reverse reaction
- Mon Mar 09, 2020 9:22 pm
- Forum: General Science Questions
- Topic: Final
- Replies: 7
- Views: 631
Re: Final
You should probs study it just in case
- Mon Mar 09, 2020 9:21 pm
- Forum: General Science Questions
- Topic: Test 2 Grades [ENDORSED]
- Replies: 23
- Views: 1639
Re: Test 2 Grades [ENDORSED]
During disc
- Mon Mar 09, 2020 9:20 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 21
- Views: 1437
Re: Final
We’re probably taking the final at the designated location
- Mon Mar 09, 2020 9:18 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Units for n
- Replies: 5
- Views: 407
Re: Units for n
n has mols for units
- Sun Mar 01, 2020 5:19 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 15
- Views: 933
Re: Test 2
Second page of outline 4 and all of 5
- Sun Mar 01, 2020 5:17 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 11
- Views: 685
Re: salt bridge
It helps maintain the balance of the charges
- Sun Mar 01, 2020 5:16 pm
- Forum: General Science Questions
- Topic: Studying
- Replies: 67
- Views: 3950
Re: Studying
Notes, homework, and textbook reading
- Sun Mar 01, 2020 5:15 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: cell potential
- Replies: 15
- Views: 830
Re: cell potential
Delta G will be negative meaning the reaction is spontaneous, if Ecell is positive. However, if Ecell is negative, deltaG will be positive. This means that the reaction will not be spontaneous
- Sun Mar 01, 2020 5:13 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Where to find Ecell values
- Replies: 15
- Views: 901
Re: Where to find Ecell values
Appendix 2B
- Sun Feb 23, 2020 8:54 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Boltzmann Formula
- Replies: 11
- Views: 892
Re: Boltzmann Formula
W = (#of states)^(# atoms)
- Sun Feb 23, 2020 8:53 pm
- Forum: Balancing Redox Reactions
- Topic: Flow of electrons
- Replies: 11
- Views: 818
Re: Flow of electrons
Anode to cathode
- Sun Feb 23, 2020 8:52 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: work
- Replies: 8
- Views: 461
Re: work
When energy leaves the system, work is negative
- Sun Feb 23, 2020 8:49 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: voltage
- Replies: 8
- Views: 425
Re: voltage
The potential difference between two electrodes
- Sun Feb 23, 2020 8:47 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cathode vs Anode
- Replies: 11
- Views: 949
Re: Cathode vs Anode
The anode is where oxidation happens and the cathode is where reduction happens
- Sun Feb 16, 2020 11:17 pm
- Forum: Phase Changes & Related Calculations
- Topic: Fusion = Melting?
- Replies: 7
- Views: 1030
Re: Fusion = Melting?
fusion means melting
- Sun Feb 16, 2020 11:15 pm
- Forum: Balancing Redox Reactions
- Topic: oxidation vs reduction
- Replies: 19
- Views: 1028
Re: oxidation vs reduction
reduction occurs when there is a gain of electrons during the reaction. Oxidation is when there's a loss of electrons during the reaction
- Sun Feb 16, 2020 11:14 pm
- Forum: Phase Changes & Related Calculations
- Topic: Negative Work
- Replies: 18
- Views: 1497
Re: Negative Work
Work is being done by the system
- Sun Feb 16, 2020 11:13 pm
- Forum: General Science Questions
- Topic: homework for week 7
- Replies: 7
- Views: 487
Re: homework for week 7
Maybe 5G from thermo
- Sun Feb 16, 2020 11:11 pm
- Forum: Balancing Redox Reactions
- Topic: Memorizing charges
- Replies: 11
- Views: 745
Re: Memorizing charges
Just know the common ones
- Sun Feb 16, 2020 11:10 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: What is residual entropy?
- Replies: 16
- Views: 4915
Re: What is residual entropy?
Residual entropy is the entropy that remains after molecules stop moving (due to the orientation of the atoms of the molecule) at 0 degrees kelvin
- Mon Feb 10, 2020 1:55 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: What is residual entropy?
- Replies: 16
- Views: 4915
Re: What is residual entropy?
The residual entropy is the entropy that is in a substance at 0 degrees Kelvin
- Mon Feb 10, 2020 1:54 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: q rev
- Replies: 9
- Views: 344
Re: q rev
heat for the reversible reaction
- Mon Feb 10, 2020 1:53 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Extra Practice
- Replies: 4
- Views: 327
Re: Extra Practice
do the homework problems
- Mon Feb 10, 2020 1:51 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Cp v.Cv
- Replies: 6
- Views: 347
Re: Cp v.Cv
CV is the molar specific heat at constant volume, while CP is the molar specific heat at constant pressure
- Mon Feb 10, 2020 1:50 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: spontaneity
- Replies: 18
- Views: 742
Re: spontaneity
spontaneous if delta g is negative
- Sun Feb 02, 2020 10:54 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess’ Law
- Replies: 10
- Views: 637
Re: Hess’ Law
the total enthalpy change for the reaction is the sum of all changes
- Sun Feb 02, 2020 10:50 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Constant Volume and Pressure
- Replies: 7
- Views: 292
Re: Constant Volume and Pressure
The volume and pressure is fixed so it will not change during the reaction
- Sun Feb 02, 2020 10:40 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Phase change
- Replies: 20
- Views: 872
Re: Phase change
It should be positive
- Sun Feb 02, 2020 10:39 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Steam burns
- Replies: 8
- Views: 299
Re: Steam burns
The stem releases more energy than boiling water
- Sun Feb 02, 2020 10:38 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: PLF sessions
- Replies: 6
- Views: 387
Re: PLF sessions
Yeah
- Sun Jan 26, 2020 10:29 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Changing K
- Replies: 13
- Views: 537
Re: Changing K
temperature
- Sun Jan 26, 2020 10:25 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Week 4 Homework
- Replies: 11
- Views: 359
Re: Week 4 Homework
Outline 4
- Sun Jan 26, 2020 10:25 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 5050
Re: Kc vs Kp
Kp should be used for gases since you are dealing with partial pressures
- Sun Jan 26, 2020 10:23 pm
- Forum: Ideal Gases
- Topic: Determining N
- Replies: 9
- Views: 426
Re: Determining N
Use gases
- Sun Jan 26, 2020 10:19 pm
- Forum: Ideal Gases
- Topic: R Constant
- Replies: 26
- Views: 1225
Re: R Constant
The one with similar units in the problem so that the units can cancel
- Sun Jan 19, 2020 10:35 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Effect of increasing pressure on reactions
- Replies: 6
- Views: 277
Re: Effect of increasing pressure on reactions
If the pressure is increased, equilibrium is disrupted. As a result, the reaction would shift to the side with the fewest number of moles.
- Sun Jan 19, 2020 10:33 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: pKa
- Replies: 13
- Views: 509
Re: pKa
Lower pKa corresponds to a stronger acid.
- Sun Jan 19, 2020 10:27 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Quadratic Equation
- Replies: 8
- Views: 385
Re: Quadratic Equation
Use the quadratic equation when x is not less than 10^-3
- Sun Jan 19, 2020 10:26 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K vs Q
- Replies: 14
- Views: 412
Re: K vs Q
K is calculated when the reaction is at equilibrium. Q is when the reaction is not at equilibrium.
- Sun Jan 19, 2020 10:22 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: K less than 10^-3
- Replies: 5
- Views: 318
Re: K less than 10^-3
Reaction sits to the left when K is less than 10^-3
- Sun Jan 12, 2020 12:10 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE box
- Replies: 9
- Views: 311
Re: ICE box
Concentration can never be negative, so disregard the negative value.
- Sat Jan 11, 2020 11:42 pm
- Forum: Ideal Gases
- Topic: PV = nRT
- Replies: 16
- Views: 1984
Re: PV = nRT
P is pressure
V is volume
n is number of moles
R is the ideal gas constant
T is temp
In this unit, remember that n/v is molarity and can allow us to calculate concentration when given pressure.
V is volume
n is number of moles
R is the ideal gas constant
T is temp
In this unit, remember that n/v is molarity and can allow us to calculate concentration when given pressure.
- Sat Jan 11, 2020 11:35 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Catalysts
- Replies: 7
- Views: 194
Re: Catalysts
When a catalyst is added to a reaction, it speeds up both the rate of the forward reaction and the reverse reaction. However, there is no change in the position of the equilibrium. Rather, equilibrium is reached faster.
- Sat Jan 11, 2020 11:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Q vs K
- Replies: 13
- Views: 496
Re: Q vs K
The value of K is determined when the reaction is at equilibrium, while the value of Q is when the reaction is not at equilibrium.
- Sat Jan 11, 2020 11:24 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic Equation
- Replies: 3
- Views: 125
Re: Quadratic Equation
It helps us figure out the final concentrations. On that note, remember to disregard any negative values when calculating concentration, as concentration can never be negative.