Search found 11 matches
- Sat Mar 09, 2019 6:23 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: 14.39 (a)
- Replies: 2
- Views: 411
Re: 14.39 (a)
I'm working through this problem and the solutions manual uses the equation: E = E^{o} - (\frac{0.025693 V}{n})ln[H+]^{2} However, I'm confused because I'm using this equation (since the Nernst equations using log and ln are interchangeable I think): E = E^{o} - \frac{0.0592}{n}log[H+]^{2} a...
- Fri Mar 08, 2019 1:28 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Slow step
- Replies: 4
- Views: 509
Slow step
How do you determine which step is the “slow step” in a reaction mechanism?
- Wed Feb 06, 2019 11:29 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: U
- Replies: 7
- Views: 653
Re: U
It means that the internal energy is dependent on the initial and final states of energy.
- Wed Feb 06, 2019 11:28 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: ΔH and ΔU
- Replies: 6
- Views: 879
Re: ΔH and ΔU
the degree symbol indicates that it's happening at STP.
- Wed Feb 06, 2019 11:27 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Degeneracy
- Replies: 2
- Views: 235
Degeneracy
What is the relationship between entropy and degeneracy?
- Thu Jan 31, 2019 9:00 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: closed vs isolated
- Replies: 14
- Views: 1085
Re: closed vs isolated
a closed system may still exchange heat energy with its surroundings while an isolated system can't. for example, an isolated system might be insulated in order to ensure it can't exchange heat energy with its surroundings.
- Thu Jan 31, 2019 8:57 pm
- Forum: Phase Changes & Related Calculations
- Topic: What Does U and q stand for?
- Replies: 9
- Views: 2370
Re: What Does U and q stand for?
U represents internal energy while q represents heat.
- Thu Jan 31, 2019 8:56 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed System
- Replies: 6
- Views: 677
Re: Closed System
They can still exchange energy, for example if the system is heated. A system is isolated if it's also insulated well and can't exchange any heat energy with its surroundings.
- Thu Jan 24, 2019 4:58 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy and States
- Replies: 8
- Views: 813
Re: Enthalpy and States
Enthalpy is heat absorbed or released at a constant pressure. Also, enthalpy is a state property so its specific value would be dependent on its current state, specifically the final minus the initial.
- Thu Jan 24, 2019 4:54 pm
- Forum: Phase Changes & Related Calculations
- Topic: ΔH and ΔU
- Replies: 2
- Views: 318
Re: ΔH and ΔU
ΔU is the change in energy of a system, so when ΔH is negative, then enthalpy of the products is less than that of the reactants so the exothermic reaction is energetically decreasing(?)
- Thu Jan 24, 2019 4:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Test 1
- Replies: 8
- Views: 797
Re: Test 1
For Test 1, what do we need to know about pH of weak acid/base and its salt? Should we just know how to solve it, or do we need a deeper conceptual knowledge of it? I'm a little confused because we didn't go over this in discussion last week. If someone could clarify, that'd be great! He noted in l...