Search found 11 matches

by Rhay Flores 4K
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: 255

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...
by Rhay Flores 4K
Fri Mar 08, 2019 1:28 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Slow step
Replies: 4
Views: 220

Slow step

How do you determine which step is the “slow step” in a reaction mechanism?
by Rhay Flores 4K
Wed Feb 06, 2019 11:29 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: U
Replies: 7
Views: 258

Re: U

It means that the internal energy is dependent on the initial and final states of energy.
by Rhay Flores 4K
Wed Feb 06, 2019 11:28 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: ΔH and ΔU
Replies: 6
Views: 307

Re: ΔH and ΔU

the degree symbol indicates that it's happening at STP.
by Rhay Flores 4K
Wed Feb 06, 2019 11:27 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Degeneracy
Replies: 2
Views: 126

Degeneracy

What is the relationship between entropy and degeneracy?
by Rhay Flores 4K
Thu Jan 31, 2019 9:00 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: closed vs isolated
Replies: 14
Views: 435

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.
by Rhay Flores 4K
Thu Jan 31, 2019 8:57 pm
Forum: Phase Changes & Related Calculations
Topic: What Does U and q stand for?
Replies: 9
Views: 390

Re: What Does U and q stand for?

U represents internal energy while q represents heat.
by Rhay Flores 4K
Thu Jan 31, 2019 8:56 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Closed System
Replies: 6
Views: 300

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.
by Rhay Flores 4K
Thu Jan 24, 2019 4:58 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy and States
Replies: 8
Views: 314

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.
by Rhay Flores 4K
Thu Jan 24, 2019 4:54 pm
Forum: Phase Changes & Related Calculations
Topic: ΔH and ΔU
Replies: 2
Views: 148

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(?)
by Rhay Flores 4K
Thu Jan 24, 2019 4:50 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1
Replies: 8
Views: 414

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...

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