Search found 14 matches
- Fri Mar 11, 2016 9:27 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Writing Redoz Rxn and Drawing Cell
- Replies: 1
- Views: 442
Re: Writing Redoz Rxn and Drawing Cell
If you are going to use the reversed value for copper, E cell = -.34V, then you do not use E cell = cathode - anode and instead just add the cathode and anode. You use E cell = cathode - anode if you keep the original E cell value and simply plug in to that equation. You should get the same answer e...
- Fri Mar 11, 2016 3:12 am
- Forum: Balancing Redox Reactions
- Topic: Winter 2016 Midterm Q6B
- Replies: 1
- Views: 410
Winter 2016 Midterm Q6B
Why is C2H5OH(aq) --> C2H4O(aq) + 2H+ + 2e- the oxidation half-reaction? Looking at the oxidation numbers from part a, I'm a little confused.
- Wed Mar 02, 2016 11:04 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Activation Energy and Temperature
- Replies: 1
- Views: 554
Activation Energy and Temperature
How do you know if an organic reaction will occur at room temperature or a higher/lower temperature based on activation energy? For example, 4.30 in the organic chemistry textbook. Thank you!
- Sun Feb 28, 2016 11:25 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Steric Factor
- Replies: 1
- Views: 1196
Steric Factor
The Arrhenius Equation refers to a constant A that includes the number of collisions and steric factor, but what exactly is this steric factor?
- Sun Feb 21, 2016 11:26 pm
- Forum: *Free Energy of Activation vs Activation Energy
- Topic: Activation energy and rate constant
- Replies: 1
- Views: 507
Activation energy and rate constant
Why is it that the slower the rate constant k the higher the activation energy? Referring to the standard free energy of activation equation
- Wed Feb 10, 2016 2:03 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Winter 2012 Midterm Q1A
- Replies: 2
- Views: 468
Winter 2012 Midterm Q1A
When using qwater = mwaterCwaterdelta T, the solution shows that the temperatures are not converted from Celsius to Kelvin for delta T. Why is this conversion not necessary? If I were to convert the temperatures to cancel out units with Cwater would the answer be wrong?
- Tue Feb 09, 2016 8:26 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: When to use ln vs log
- Replies: 1
- Views: 725
When to use ln vs log
When can you use the Nernst equation using ln vs using log10? Can you only use ln under certain conditions?
- Sun Feb 07, 2016 5:36 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Value for n
- Replies: 1
- Views: 811
Value for n
When using the Nernst Equation, how do you know what value to put for n number of moles?
- Sun Jan 31, 2016 3:03 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Finding Gibs free energy
- Replies: 1
- Views: 645
Re: Finding Gibs free energy
Hi,
Breaking a diatomic molecule X2(g) requires energy to become 2X(g), and therefore the reaction is endothermic. This is true for other halogens as well
Breaking a diatomic molecule X2(g) requires energy to become 2X(g), and therefore the reaction is endothermic. This is true for other halogens as well
- Tue Jan 19, 2016 10:41 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3590647
Re: Chemistry Jokes
Why does a hamburger have lower energy than a steak?
It's in the ground state.
It's in the ground state.
- Mon Jan 18, 2016 7:28 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: States
- Replies: 3
- Views: 666
Re: States
No, that's what I was asking I just worded it incorrectly. Thank you!
- Sun Jan 17, 2016 10:26 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: States
- Replies: 3
- Views: 666
States
Why do molecules in the gaseous phase occupy more states than the liquid phase and the solid phase?
- Sun Jan 10, 2016 8:41 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies~Clarification
- Replies: 2
- Views: 502
Re: Bond Enthalpies~Clarification
Like you said, bonds that are formed have negative values since it is an exothermic process. Therefore you don't subtract the values from one another, rather you are adding negative values together. For an example of this, you could reference page 18 in the course reader
- Sun Nov 29, 2015 11:48 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VIDEO: Quiz 2 Question 8
- Replies: 1
- Views: 511