Search found 11 matches

by Jeffrey_Huang_2K
Sun Mar 19, 2017 12:51 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: The different Nernst equations
Replies: 2
Views: 443

Re: The different Nernst equations

Yes they are equivalent (T=298K). Dr. Lavelle mentioned in class that the log version is frequently used to consider pH.
by Jeffrey_Huang_2K
Tue Mar 14, 2017 11:26 pm
Forum: *Haloalkenes
Topic: Haloalkane/Haloalkene Naming question
Replies: 1
Views: 521

Re: Haloalkane/Haloalkene Naming question

Yes, alkenes are prioritized over alkynes for numbering.
by Jeffrey_Huang_2K
Thu Mar 09, 2017 11:24 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1015207

Re: Post All Chemistry Jokes Here

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by Jeffrey_Huang_2K
Sun Mar 05, 2017 8:31 pm
Forum: *Alkanes
Topic: Naming [ENDORSED]
Replies: 92
Views: 8289

Re: Naming [ENDORSED]

Those numbers refer to the carbon to which the halogen is attached, numbering follows the same rules, so the lowest numbering scheme is chosen.
by Jeffrey_Huang_2K
Sat Feb 25, 2017 11:21 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1015207

Re: Post All Chemistry Jokes Here

Image
by Jeffrey_Huang_2K
Thu Feb 16, 2017 11:32 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 7582
Views: 1015207

Re: Post All Chemistry Jokes Here

Image
by Jeffrey_Huang_2K
Fri Feb 10, 2017 10:23 pm
Forum: Calculating Work of Expansion
Topic: Which process does more work?
Replies: 3
Views: 458

Re: Which process does more work?

You'll want to calculate the work done by each pathway.
Path A is done at constant pressure so use W=-P*DeltaV (irreversible pathway)
Path B is reversible expansion so use W=-nrT*ln(V2/V1) (reversible pathway)
by Jeffrey_Huang_2K
Tue Jan 31, 2017 9:26 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Degeneracy
Replies: 4
Views: 593

Re: Degeneracy

The formula to find entropy from degeneracy is: S = Kb * ln(W)

Where W is degeneracy of a system and Kb is the Boltzmann Constant = 1.3807e-23 J/K
by Jeffrey_Huang_2K
Thu Jan 26, 2017 10:35 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Midterm winter 2013 question #4
Replies: 3
Views: 315

Re: Midterm winter 2013 question #4

Because it is an ideal gas, the equations are equivalent due to Boyle's Law. So either one would work and would lead you to the same answer :)
by Jeffrey_Huang_2K
Thu Jan 19, 2017 10:53 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.45
Replies: 3
Views: 467

Re: 8.45

The reaction enthalpy of deltaH = +358.8 kJ specifically describes the situation where one mol of S8 reacts. When 1.25 mol is reacted, then the reaction enthalpy (notice it is positive so heat is absorbed) is also multiplied by this new amount of reactant.

(358.8 kJ)(1.5 mol S8) = 448.5 kJ
by Jeffrey_Huang_2K
Fri Jan 13, 2017 8:47 pm
Forum: Phase Changes & Related Calculations
Topic: Sublimation Heating Curve
Replies: 1
Views: 251

Re: Sublimation Heating Curve

Yes, the heat of sublimation is the sum of the enthalpy of fusion and the enthalpy of vaporization. Because enthalpy is a state function, even though in sublimation substances do not pass through the liquid phase, the total amount of energy required is still the sum of the individual amounts of ener...

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