Search found 21 matches

by Mariana Fuentes 4l
Sun Feb 24, 2019 10:35 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n in -nFE
Replies: 6
Views: 40

Re: n in -nFE

n is the number of electrons transferred.
by Mariana Fuentes 4l
Sun Feb 24, 2019 10:31 pm
Forum: Balancing Redox Reactions
Topic: Salt Bridge
Replies: 5
Views: 22

Re: Salt Bridge

The importance of a salt bridge is to maintain charge balance since electrons are moving from one side of the bride to the other.
by Mariana Fuentes 4l
Sun Feb 24, 2019 10:29 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Spontaneous?
Replies: 13
Views: 71

Re: Spontaneous?

if delta s is positive the process will be spontaneous. if delta g is negative then it is exergonic meaning that it is spontaneous in the forward direction. if delta g is greater than 0 it is spontaneous in the reverse direction. delta h <0 and delta s>0 spontaneous delta h<0 and delta s spontaneous...
by Mariana Fuentes 4l
Sun Feb 17, 2019 10:26 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 6th edition
Replies: 1
Views: 26

6th edition

Does anyone know what problems start off with the gibbs free energy on the 6th edition?
by Mariana Fuentes 4l
Sun Feb 17, 2019 10:25 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Graphs
Replies: 2
Views: 48

Graphs

Also, does anyone know how the graphs are going to be used on a homework problem or test?
by Mariana Fuentes 4l
Sun Feb 17, 2019 10:24 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Endothermic and Exothermic Graphs
Replies: 3
Views: 43

Endothermic and Exothermic Graphs

Can anyone explain to me the difference between these two graphs please?
by Mariana Fuentes 4l
Sun Feb 10, 2019 8:47 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 3rd Law of Thermodynamics
Replies: 2
Views: 43

3rd Law of Thermodynamics

Are the units for the 3rd law and the 2nd law different?
by Mariana Fuentes 4l
Sun Feb 10, 2019 8:42 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 6th edition 9.61
Replies: 1
Views: 23

6th edition 9.61

Can someone explain how they got the answer. I'm having trouble figuring out. Thank you!
by Mariana Fuentes 4l
Sun Feb 10, 2019 8:41 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 6th edition 9.7
Replies: 1
Views: 21

6th edition 9.7

Can anyone explain how to do this problem please? I tried solving but get a different answer every time. Thank you!
by Mariana Fuentes 4l
Sun Feb 03, 2019 8:52 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Material on Midterm?
Replies: 9
Views: 108

Re: Material on Midterm?

I'm Pretty sure the exam will include some concepts of the 2nd and 3rd law of thermodynamics
by Mariana Fuentes 4l
Sun Feb 03, 2019 8:50 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: 8.43 6th edition
Replies: 1
Views: 23

8.43 6th edition

Can someone help me with this problem and explain the overall concept of it please? My TA went over it in class but I didn't really understand it. Thank you!
by Mariana Fuentes 4l
Sun Feb 03, 2019 12:21 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Week 4 HW
Replies: 2
Views: 38

Week 4 HW

Does any one know what chapters are we allowed to use for the homework this week?
by Mariana Fuentes 4l
Sun Jan 27, 2019 2:37 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 6th edition, 4A3 pt c
Replies: 2
Views: 46

Re: 6th edition, 4A3 pt c

I had this same problem and caused me lots of confusion. I would say to go with the 6th edition since it contains less errors.
by Mariana Fuentes 4l
Sun Jan 27, 2019 2:35 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 3 Methods to solve for Enthaply
Replies: 3
Views: 36

3 Methods to solve for Enthaply

Can anyone describe each method and when its appropriate to use them? thank you!
by Mariana Fuentes 4l
Sun Jan 27, 2019 2:31 pm
Forum: Phase Changes & Related Calculations
Topic: Lecture 1/25
Replies: 1
Views: 29

Lecture 1/25

Is there any chance that someone could fill be in on what Dr.Lavelle went over towards the end of lecture? I had to leave early to attend a study session.
by Mariana Fuentes 4l
Sun Jan 20, 2019 3:57 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Changes in K
Replies: 4
Views: 37

Re: Changes in K

Temperature changes the equilibrium constant. When temperature increases the Kp decreases.
by Mariana Fuentes 4l
Sun Jan 20, 2019 3:56 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Le Chateliers Principle
Replies: 4
Views: 42

Re: Le Chateliers Principle

Changing the temperature will affect the equilibrium constant. When temperature increases the Kp decreases. The pressure doesn't necessarily change the equilibrium constant due to the position of equilibrium changes to maintain the constant value.
by Mariana Fuentes 4l
Sun Jan 20, 2019 3:47 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Weak/Strong Acid and Bases
Replies: 1
Views: 26

Weak/Strong Acid and Bases

How can we determine whether it is a strong/weak acid and a strong/weak base?
by Mariana Fuentes 4l
Sun Jan 13, 2019 1:57 pm
Forum: Ideal Gases
Topic: Units
Replies: 19
Views: 161

Re: Units

You use Kelvin since R is in terms of Kelvin. If you were given a different temperature unit, you would have to convert it to Kelvin.

Example, 52 degrees Celsius to K.
C+273.15=K
52+273.15=300.15K
by Mariana Fuentes 4l
Sun Jan 13, 2019 1:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solving for K
Replies: 7
Views: 57

Re: Solving for K

You use parenthesis when solving/ using Kp and you use brackets when solving using Kc.
by Mariana Fuentes 4l
Sun Jan 13, 2019 1:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 5
Views: 27

Kc and Kp

How do we know when to use Kc and Kp? During discussion our TA wanted us to do the homework based on Kc even though the state of the equation was g.

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