CHEMISTRY COMMUNITY

Karissa_Lee_1A

The Nernst equation relates the equilibrium potential of a half-cell to the concentrations of the reactants and products and the temperature of the system. The equation is commonly used to calculate the potential difference of an electrochemical cell under non-standard conditions. The spontaneity of...

Karissa_Lee_1A

Inert electrodes, also known as non-reactive electrodes, are electrodes that do not participate in the electrochemical reaction of the cell. They are added to a cell diagram when one or both of the half-reactions in the cell involve a gas or a metal ion that can be reduced or oxidized at the electro...

Karissa_Lee_1A

The order of a reaction describes the relationship between the rate of the reaction and the concentration of the reactants. It can be zero, first, second, or higher order. The order of a reaction is experimentally determined by measuring the change in the reaction rate as the concentration of one re...

Karissa_Lee_1A

In chemical kinetics, order and molecularity are both concepts used to describe the rate of a chemical reaction, but they have different meanings: Order refers to the relationship between the concentration of a reactant and the rate of the reaction. It describes the dependence of the rate of the rea...

Karissa_Lee_1A

Heat and enthalpy are both measures of energy, but there is an important difference between the two: Heat is a transfer of energy that occurs between two objects or systems as a result of a temperature difference. Heat is a process variable, meaning it depends on the path taken to transfer energy be...

Karissa_Lee_1A

Enthalpy is positive for breaking bonds because energy is required to break chemical bonds. Breaking a bond requires energy to be supplied to the system, and this energy is absorbed by the molecules involved in the reaction. The energy required to break a bond is known as the bond dissociation energ...

Karissa_Lee_1A

In a chemical reaction, the conjugate acid is the species that is formed when a base accepts a proton (H+). To identify the conjugate acid in a reaction, you can follow these steps: Identify the base in the reaction. A base is a substance that accepts a proton (H+). Determine what happens to the bas...

Karissa_Lee_1A

No, Le Chatelier's Principle is a general principle that applies to any chemical reaction, regardless of the specific chemical structures involved. Le Chatelier's Principle states that a system at equilibrium will respond to any stress or change in conditions by shifting its equilibrium position in ...

Karissa_Lee_1A

I really enjoy the arches at Royce Hall.

Karissa_Lee_1A

Anything from Khan Academy has really helped me with understanding the content from this course.

Karissa_Lee_1A

The final is 25 questions, the professor said that the content is equally distributed from all weeks and that two of the questions will be the same as the two past respondus questions.

Karissa_Lee_1A

Hello! Could someone explain the relationship between Gibbs free energy and work?

Karissa_Lee_1A

Could anyone explain the gibbs free energy of formation?

Karissa_Lee_1A

Hello! In class it was mentioned that the concentration of the anode increases, and I was just wondering if someone could explain how that works.

Karissa_Lee_1A

H2O as a liquid allows the molecules to have more movement as opposed to that of solid H2O.

Karissa_Lee_1A

He just posted that he's looking for a regrade so I don't think that was anyone's final score.

Karissa_Lee_1A

It was a little harder than the first one but I'm glad it's over haha.

Karissa_Lee_1A

I was very surprised to see that the first midterm was mostly conceptual, but at least we know what to study for on the next one.

Karissa_Lee_1A

Everything we learned Weeks 3-6 should be on there since the midterm is next wednesday.

Karissa_Lee_1A

Reading the textbook to fill in missing information that is not completely covered in lecture is very helpful.

Karissa_Lee_1A

I was also wondering this, but I've posted extra to make up for what I missed anyway just in case they do count and to receive credit.

Karissa_Lee_1A

The picture was mainly to just explain the different arrangements of molecules depending on the different states and the number of particles.

Karissa_Lee_1A

I really only commute on the weekends, but I definitely believe planning out your week helps so much to stay on top of things. I have classes throughout the week and have to commute Friday morning and come back around Sunday afternoon. It's about 1.5 hrs each way.

Karissa_Lee_1A

For (a) you would want to: 1) NH3 + H2O <-> NH4+ + OH- then do an ice table I 0.057 M 0 0 C -x +x +x E .057 x x ignore x since Kb= 1.8e-5 is small Then do K = x^2/.057 and solve for x which is equal to the concentration of OH-. then do -log[OH-] = pOH and you can find pH from 14-pOH. Hope you can s...

Karissa_Lee_1A

Hi,

I was just wondering if we had to memorize the list of acids and bases as well as their names for the midterm?

Karissa_Lee_1A

Taking time in between studying to focus on something else.

Karissa_Lee_1A

Intensive properties are nondependent on the amount of a substance, so by dividing heat capacity by the amount of the substance, you are turning it to an intensive property.

Karissa_Lee_1A

Steam causes more severe burns because the amount of work to turn water to vapor is greater than the work to boil water.

Karissa_Lee_1A

How can you tell if a compound is acidic or basic? For regular compounds you would need to calculate the pH. For salts, there's a list of strong acids and bases that you can use. If the salt is made up of a strong base and weak acid the salt is basic; if the salt has a strong acid and weak base the...

Karissa_Lee_1A

Prof Lavelle said that he will base some of the problems off the textbook problems from the syllabus so I would start there.

Karissa_Lee_1A

Anything chocolate.

Karissa_Lee_1A

K will only be affected by the change in temperature.

Karissa_Lee_1A

Since the list of acids and bases is not a handout they want us to print does that mean we need to memorize them for the midterm?

Karissa_Lee_1A

Which weeks are going to be tested on for the first midterm?

Karissa_Lee_1A

I have a job in Riverside county that I have to commute to so it's definitely a struggle to keep up the balance with school but in the end it's good experience so I don't mind too much.

Karissa_Lee_1A

If we missed points could we make it up the next week or are you only limited to 3 points?

Karissa_Lee_1A

Is it possible to earn more than 3 pts per week? If I posted/replied 4 times would I be able to get 4 pts?

CHEMISTRY COMMUNITY

Search found 37 matches

Re: Conceptual question about the nernst equation and gibbs

Re: inert electrodes

Re: Relationship between order and number of steps in a reaction

Re: Order vs Molecularity

Re: What is the difference between heat and enthalpy?

Re: Forming and breaking bonds

Re: acids and bases

Re: Compressing a RXN mixture

Re: Relaxing spots on campus

Re: Recommended videos

Re: Final

Gibbs free energy and work

Re: Standard Gibbs Free Energy

Concentration cells

Re: Phase changes have enthalpy

Re: Midterm 2 Scores

Re: Post-Midterm 2 Brain Dump Corner

Re: Post-Midterm 1 Check in Topic

Re: What will be on MT2?

Re: For students that got an A on the first midterm, how did you study?

Re: Posts per Week Deadline

Re: Dog bone shapes from 2/6 lecture? [ENDORSED]

Re: commuting to school

Re: Textbook Problem 6D.5

Strong Acids and Bases on Midterm 1

Re: Final Jitters

Re: Specific Heat and its Properties

Re: Why does steam cause burns? [ENDORSED]

Re: Acids and Bases

Re: Study Tips

Re: Fav Candy

Re: K - constant

Re: Midterm

Midterm Content

Re: Students Who Have a Job

Re: New account for Chem 14B?

Re: chem community discussion points