CHEMISTRY COMMUNITY

Shelby Yee 1J

the anode is the cell that is oxidized and the cathode is the cell that is reduced. if both reduction potentials are negative values, both are not likely to be reduced, however the larger value will be the one that is more likely to be reduced. So, if you put the values on a number line, the one tha...

Shelby Yee 1J

I think I just figured it out. For anyone that had the same question, there is a 1 in the numerator because the concentration of the reactants does not count into the equation since one is in the solid state and one is water.

Shelby Yee 1J

Could you please explain where Q=1/[O2] comes from? I understand that Q is the ratio of the concentration of products and reactants, but I'm not sure how this equation is figured out.

Shelby Yee 1J

I believe it goes by the lowest numbering principle still if the functional groups are all just hydroxyl groups.

Shelby Yee 1J

@Johnchou1A the Iodine gets ultimate priority since it has a higher atomic number, therefore, iodine should be 1 and bromine should be 3

Shelby Yee 1J

Free energy is the amount of energy available to do work, whereas potential energy is energy that an object has due to its position. An object tends to go from a state of higher potential energy to one of lower potential energy (this demonstrates whether a reaction is favorable or not).

Shelby Yee 1J

The unique rate of reaction is the rate of the reaction divided by the coefficients. So since the rate of the reaction is 6.5x10^-3, you should divide by 2 which is the coefficient of NO2.

Shelby Yee 1J

No, there should not be any material on the quiz past page 75.

Shelby Yee 1J

For reversible expansion, the external and internal pressures are initially the same. When the external pressure is changed an infinitesimally small amount, the system is allowed to do work until it reaches equilibrium. In this way (allowing the system to do work in an infinitely small amount of inc...

Shelby Yee 1J

You can have both negative and positive values for voltage depending on which way the reaction is going. So yes, both negative and positive values are acceptable.

Shelby Yee 1J

Generally, entropy is just described as increasing or decreasing. This change in entropy is then useful in understanding and analyzing reactions.

Shelby Yee 1J

The workbook has practice quizzes with answers from previous years as a study resource. There is also a quiz in the workbook which you can complete and turn in to your discussion section on the day of the quiz. These quizzes will be graded, and will replace your lowest quiz score, so it is highly re...

Shelby Yee 1J

The Carbon atoms in the C2H2 molecule are bonded together by a triple bond, so this must be broken and they must be rearranged into a ring in which the Carbons are bonded by only single bonds. It takes more energy to break a triple bond than a single bond, so this might be the reason behind the disc...

Shelby Yee 1J

Can you explain what the difference in reversible and irreversible processes and what the significance of both are?
Thank you!

Shelby Yee 1J

Both calorimeters, the bomb calorimeter and the coffee cup calorimeter, serve the same purpose and work in the same way. Both measure changes of heat that occur as a result of a reaction inside. The bomb calorimeter is just more advanced in that it is capable of withstanding more pressure from a rea...

Shelby Yee 1J

The way I interpreted it was that a reversible process is essentially a "balance" in a way. This means that any off-setting measurements, however infinitely small, can push it in either direction.

Shelby Yee 1J

Autoprolysis occurs when a molecule donates a proton to a molecule of the same type. If a molecule donates a proton to a molecule of a different type, then it is just an example of an acid-base reaction. Autoprolysis is just specifically a proton transfer between like-molecules. An example is water....

Shelby Yee 1J

Shelby Yee discussion 1J
Stephanie Manzo discussion 1H

Shelby Yee 1J

You set up the K constant equation, Kp=[products]/[reactants]. When you plug in known values you should be able to solve for the missing partial pressure.

Shelby Yee 1J

When Dr. Lavelle did examples in class I do not believe that he put the "P" in. So maybe that indicates that it's not necessary on tests and quizzes.

Shelby Yee 1J

Radicals are atoms, molecules, or ions with an unpaired electron. Biradicals are atoms, molecules, or ions with 2 unpaired electrons. This is significant in that it makes them extremely reactive.

Shelby Yee 1J

Actually, the Heisenberg equation demonstrates the opposite. Your supposition that a particle with a larger mass will have a greater certainty of position than a smaller particle traveling at the same velocity is correct. The Heisenberg equation calculates a value of uncertainty, so when dividing h/...

Shelby Yee 1J

If light exhibited only wave-like properties, then increasing the amplitude of the light waves should have caused electrons to be ejected. Scientists conducting the experiment tried using a brighter light source, but did not achieve the expected result. Instead, when using a light source that emitte...

Shelby Yee 1J

The 4s subshell usually fills up before the 3d subshell. The exceptions occur when the d subshell is half full (d^5) or full (d^10). This happens because the 3d subshell is most stable when each orbital is balanced (has the same number of electrons in each orbital), so to do this it will "steal...

Shelby Yee 1J

The energy of the photon emitted is equal to the amount of energy absorbed by the electron to reach the higher energy level. It is not a common practice to determine the energy between electron energy levels by studying absorption because it is a more difficult experiment and could be harder to yiel...

Shelby Yee 1J

Spectral lines on the emission spectrum show the specific wavelengths of light that are absorbed or emitted from an electron in a transitory state between energy levels. So, you could use the different wavelengths to find the amount of energy given off or absorbed to attain different energy levels u...

Shelby Yee 1J

The energy of the light emitted as a photon is equal to the amount of light absorbed by the electron. By calculating the light energy emitted using the Rydberg formula, you are also calculating the amount of light energy that was initially absorbed.

Shelby Yee 1J

h/4pi is an experimentally determined constant. Basically, it exists to show that there is a limit to the certainty to which you can know the position and the momentum of the particle simultaneously.

Shelby Yee 1J

Hello, Can someone please explain what psi represents in the Born interpretation of the wave function? I understand that psi^2 is the probability density, and when graphed can actually show the likelihood that the particle will be found in a specific region. But what is the significance of just psi ...

CHEMISTRY COMMUNITY

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Re: Anode/Cathode Determining

Re: Winter Final 2013 #4B

Winter Final 2013 #4B

Re: How to name multiple hydroxy groups?

Re: Quiz 3 Preparation

Re: Potential Energy vs Free Energy

Re: Unique rate of reaction

Re: Quiz 2

Re: Reversible vs irreversible expansion

Re: Positive/Negative Voltage

Re: Describing changes in entropy

Re: Workbook Quizes

Re: Using bond enthalpies to find reaction enthalpy

reversible and irreversible process

Re: Reg Calorimeter v. Bomb Calorimeter

Re: Thermodynamic definition of reversible/irreversible proc

Re: Autoprotolysis

Video: Periodic Trends-Electronegativity/Ionization Energy

Re: Partial Pressures and Equilibrium

Re: Equilibrium constant and p

Re: Radicals

Re: Using the Equation for Subatomic Particles

Re: Intensity with photoelectric effect

Re: Electron Configurations in the d Orbital

Re: Balmer Series

Re: Atomic Spectra Explanation

Re: Calculating Light Absorption

Re: h/4pi in Heisenberg's Indeterminacy Equation

Psi in the Born interpretation of the wave function