Search found 11 matches
- 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: 709
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.
- Tue Mar 14, 2017 11:26 pm
- Forum: *Haloalkenes
- Topic: Haloalkane/Haloalkene Naming question
- Replies: 1
- Views: 1348
Re: Haloalkane/Haloalkene Naming question
Yes, alkenes are prioritized over alkynes for numbering.
- Thu Mar 09, 2017 11:24 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591301
- Sun Mar 05, 2017 8:31 pm
- Forum: *Alkanes
- Topic: Naming [ENDORSED]
- Replies: 93
- Views: 16630
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.
- Sat Feb 25, 2017 11:21 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591301
- Thu Feb 16, 2017 11:32 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3591301
- Fri Feb 10, 2017 10:23 pm
- Forum: Calculating Work of Expansion
- Topic: Which process does more work?
- Replies: 5
- Views: 1767
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)
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)
- Tue Jan 31, 2017 9:26 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Degeneracy
- Replies: 4
- Views: 1094
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
Where W is degeneracy of a system and Kb is the Boltzmann Constant = 1.3807e-23 J/K
- Thu Jan 26, 2017 10:35 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Midterm winter 2013 question #4
- Replies: 3
- Views: 723
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 :)
- 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: 920
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
(358.8 kJ)(1.5 mol S8) = 448.5 kJ
- Fri Jan 13, 2017 8:47 pm
- Forum: Phase Changes & Related Calculations
- Topic: Sublimation Heating Curve
- Replies: 1
- Views: 594
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...