Search found 43 matches

by Mariana Fuentes 1L
Sun Feb 16, 2020 6:51 pm
Forum: Balancing Redox Reactions
Topic: Determining charge
Replies: 5
Views: 59

Re: Determining charge

I'm having a difficult determining this as well. I'm not sure if there is an easier way to do this, but the way I am finding it takes me a long time and I don't think I am doing it the correct way.
by Mariana Fuentes 1L
Sun Feb 16, 2020 6:47 pm
Forum: Balancing Redox Reactions
Topic: redox reaction
Replies: 10
Views: 85

Re: redox reaction

An easy way to remember is: The LEO goes GER.

LEO: Lose Electrons Oxidation

GER: Gain Electrons Reduction
by Mariana Fuentes 1L
Sun Feb 16, 2020 6:46 pm
Forum: Balancing Redox Reactions
Topic: Oxygen
Replies: 9
Views: 74

Re: Oxygen

Does anyone know an easier way of telling the oxidation or reduction number?
by Mariana Fuentes 1L
Sun Feb 16, 2020 6:43 pm
Forum: Balancing Redox Reactions
Topic: Half reactions
Replies: 7
Views: 71

Re: Half reactions

A way of identifying redox reactions is : The LEO goes GER.

LEO: Lose Electrons Oxidation

GER: Gain Electrons Reduction
by Mariana Fuentes 1L
Tue Feb 11, 2020 2:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Exam Loactions
Replies: 1
Views: 34

Exam Loactions

Can someone tell me where the midterm exam rooms are going to be? I’m not sure where to find that information. Thank you!
by Mariana Fuentes 1L
Sun Feb 09, 2020 8:25 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: State Function
Replies: 7
Views: 65

Re: State Function

You can use it. You just have to make sure you arrange the equations to be equal to delta G.
by Mariana Fuentes 1L
Sun Feb 09, 2020 8:23 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Weak acid/base
Replies: 14
Views: 158

Re: Weak acid/base

Does that mean that Ka and pKa are kind of opposite?
by Mariana Fuentes 1L
Sun Feb 09, 2020 8:20 pm
Forum: Calculating Work of Expansion
Topic: Reversible vs Irreversible
Replies: 3
Views: 34

Re: Reversible vs Irreversible

I'm not too sure, but assume so.
by Mariana Fuentes 1L
Sun Feb 09, 2020 8:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Content
Replies: 6
Views: 77

Re: Midterm Content

It's everything but the 2nd page of the last outline he posted.
by Mariana Fuentes 1L
Sat Feb 01, 2020 7:44 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Closed Systems
Replies: 8
Views: 85

Re: Closed Systems

For a closed system think of Pressure cooker or frying pan on stove with the lid on. For an isolated system think of a hydroflask.
by Mariana Fuentes 1L
Sat Feb 01, 2020 7:39 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: isolated system
Replies: 13
Views: 105

Re: isolated system

Think of a hydroflask
by Mariana Fuentes 1L
Sat Feb 01, 2020 7:36 pm
Forum: Phase Changes & Related Calculations
Topic: Open vs Isolated System
Replies: 15
Views: 626

Re: Open vs Isolated System

Closed you can exchange with whats inside, while isolated you can't exchange at all.
by Mariana Fuentes 1L
Sat Feb 01, 2020 1:15 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: q and delta H
Replies: 2
Views: 26

Re: q and delta H

Can someone thoroughly explain it please?
by Mariana Fuentes 1L
Thu Jan 23, 2020 1:32 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ice table
Replies: 13
Views: 84

Re: ice table

You don’t include solids(s) or liquids(l).
by Mariana Fuentes 1L
Thu Jan 23, 2020 12:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Material
Replies: 3
Views: 50

Re: Test 1 Material

Does anyone know how many questions will be on the exam?
by Mariana Fuentes 1L
Thu Jan 23, 2020 12:33 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5% rule
Replies: 13
Views: 129

Re: 5% rule

I believe you use it when the number is very close to zero that it doesn’t make a difference to the overall answer
by Mariana Fuentes 1L
Thu Jan 23, 2020 12:32 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: H20 in the ICE table
Replies: 26
Views: 231

Re: H20 in the ICE table

Do not include H2O.
by Mariana Fuentes 1L
Thu Jan 23, 2020 12:29 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: pH sig figs
Replies: 9
Views: 72

Re: pH sig figs

2 significant figures from the decimal.
by Mariana Fuentes 1L
Thu Jan 23, 2020 12:28 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n in -nFE
Replies: 14
Views: 210

Re: n in -nFE

The number of electrons transferred is what the n stands for.
by Mariana Fuentes 1L
Fri Jan 17, 2020 7:44 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Conjugate Acids/Bases
Replies: 2
Views: 87

Re: Conjugate Acids/Bases

Acids increase the concentration of hydrogen ions and bases decrease the concentration of hydrogen ions. With that said, the relationship between them is through the concentration of hydrogen ions.
by Mariana Fuentes 1L
Sun Feb 24, 2019 10:35 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: n in -nFE
Replies: 14
Views: 210

Re: n in -nFE

n is the number of electrons transferred.
by Mariana Fuentes 1L
Sun Feb 24, 2019 10:31 pm
Forum: Balancing Redox Reactions
Topic: Salt Bridge
Replies: 5
Views: 141

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 1L
Sun Feb 24, 2019 10:29 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Spontaneous?
Replies: 13
Views: 394

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 1L
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: 89

6th edition

Does anyone know what problems start off with the gibbs free energy on the 6th edition?
by Mariana Fuentes 1L
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: 147

Graphs

Also, does anyone know how the graphs are going to be used on a homework problem or test?
by Mariana Fuentes 1L
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: 253

Endothermic and Exothermic Graphs

Can anyone explain to me the difference between these two graphs please?
by Mariana Fuentes 1L
Sun Feb 10, 2019 8:47 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 3rd Law of Thermodynamics
Replies: 2
Views: 127

3rd Law of Thermodynamics

Are the units for the 3rd law and the 2nd law different?
by Mariana Fuentes 1L
Sun Feb 10, 2019 8:42 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 6th edition 9.61
Replies: 1
Views: 77

6th edition 9.61

Can someone explain how they got the answer. I'm having trouble figuring out. Thank you!
by Mariana Fuentes 1L
Sun Feb 10, 2019 8:41 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: 6th edition 9.7
Replies: 1
Views: 71

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 1L
Sun Feb 03, 2019 8:52 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Material on Midterm?
Replies: 9
Views: 327

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 1L
Sun Feb 03, 2019 8:50 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: 8.43 6th edition
Replies: 1
Views: 100

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 1L
Sun Feb 03, 2019 12:21 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Week 4 HW
Replies: 2
Views: 156

Week 4 HW

Does any one know what chapters are we allowed to use for the homework this week?
by Mariana Fuentes 1L
Sun Jan 27, 2019 2:37 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 6th edition, 4A3 pt c
Replies: 2
Views: 121

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 1L
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: 141

3 Methods to solve for Enthaply

Can anyone describe each method and when its appropriate to use them? thank you!
by Mariana Fuentes 1L
Sun Jan 27, 2019 2:31 pm
Forum: Phase Changes & Related Calculations
Topic: Lecture 1/25
Replies: 1
Views: 106

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 1L
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: 165

Re: Changes in K

Temperature changes the equilibrium constant. When temperature increases the Kp decreases.
by Mariana Fuentes 1L
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: 158

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 1L
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: 103

Weak/Strong Acid and Bases

How can we determine whether it is a strong/weak acid and a strong/weak base?
by Mariana Fuentes 1L
Sun Jan 13, 2019 1:57 pm
Forum: Ideal Gases
Topic: Units
Replies: 19
Views: 406

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 1L
Sun Jan 13, 2019 1:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solving for K
Replies: 7
Views: 182

Re: Solving for K

You use parenthesis when solving/ using Kp and you use brackets when solving using Kc.
by Mariana Fuentes 1L
Sun Jan 13, 2019 1:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 5
Views: 165

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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