CHEMISTRY COMMUNITY

Rachel Risoleo 3G

I think snacks would be appropriate. Definitely pop tarts are okay. Chips might be a bit inconsiderate.

Rachel Risoleo 3G

Is work a pathway function rather than a state function? If so, why is it that we can sometimes add the work of different steps to get the overall work for the reaction?

Rachel Risoleo 3G

An SN2 reaction is a single-step mechanism substitution reaction. An electrophilic addition reaction's primary identifying characteristic is the addition of an electrophile to a larger molecule.

Rachel Risoleo 3G

In the solutions manual for 15.63, there is a "-0.59" subtracted from the equation ln(k'/k)=Ea/R(1/T2-1/T1). Is this meant to be the value of lnA, and if so, how were we meant to find it? (it wasn't given in the equation). If not, does anyone know what this value represents? Thanks so much.

Rachel Risoleo 3G

How do you determine which step of an organic reaction will occur first? i.e. nucleophile or electrophile? Or how do you know if these steps occur simultaneously?

Rachel Risoleo 3G

No one has posted on this feed in a while because all the good Chem jokes Argon ;)

Rachel Risoleo 3G

Will first order and second order rate laws be on the midterm? (as they have been in previous years)
Thanks!

Rachel Risoleo 3G

I don't know that it's all that important, but I do think it was mentioned in lecture that the anode is drawn on the left. To be safe, I would draw the anode on the left, the cathode on the right.

Rachel Risoleo 3G

Why did the acid go to the gym?
-To become a buffer solution!

Why did the big white bear dissolve in water?
-Because he was polar.

What do dipoles say in passing?
-Have you got a moment?

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Rachel Risoleo 3G

Also, because a reversible process has minute changes to properties (i.e. volume, pressure), irreversible processes generally have larger and faster changes to these properties (for example, a gas might expand quickly, in one large increment, rather than slowly in many small ones).

Rachel Risoleo 3G

I believe the heat does come in for the purpose of maintaining a constant temperature, and so that the change in energy (and the change in temperature) is zero.

Rachel Risoleo 3G

A calorimeter measures the heat created by a sample that is burned (combusted) in a closed vessel. The sample is burned in an oxygen atmosphere, surrounded by water, and under constant conditions. The heat created by the combustion is transferred to the surrounding water, and that is how the heat is...

Rachel Risoleo 3G

Video explaining the biological function of coordination compounds hemoglobin and myoglobin

Rachel Risoleo 3G

I agree with the above. In lecture the other day, Dr. Lavelle said that it is usually okay to make the assumption if K<10^-5, however I would still always check at the end of the calculation to ensure that it did not specifically impact your value!

Rachel Risoleo 3G

Also, due to the shape of the oxalato complex, only two of the oxygen atoms will be able to bond, because they are opposite each other. It has less to do with the double or single nature of the bond because, as we know due to resonance structures, in nature all bonds will tend to be the same, with a...

Rachel Risoleo 3G

Hi! Could someone please specify what exactly the relationship between Kp and Kc is and how to derive it? Thank you!

Rachel Risoleo 3G

For the Balmer series, nf=2; for the Lyman series, nf=1

Rachel Risoleo 3G

Hi! The equation E=hc/lamda gives the "energy per photon." So in problem 1.27 for example, you can find the E/photon using hc/lamda, and then use dimensional analysis to find the number of photons (you can convert the Watts to Joules by multiplying W by the number of seconds, because W=J/s...

Rachel Risoleo 3G

Anions are ions with a negative charge (they have gained electrons), whereas "Cat"ions are ions with a positive charge (they're "paws"itive :) )

CHEMISTRY COMMUNITY

Search found 19 matches

Re: Final Exam - snacks?

work and state function

Re: SN2

Homework problem 15.63

Reaction steps

Re: Chemistry Jokes

Midterm material

Re: Anodes and Cathodes

Re: Chemistry Jokes

Re: Irreversible and Reversible Processes

Re: Constant Temperature in Ideal Gas Expansion

Re: Calorimeter Process

Re: Video: Hemoglobin and Myoglobin in the Body

Re: When is K small enough to make the assumption

Re: Bidentate or Polydentate

relationship between Kp and Kc

Re: Balmer vs Lyman Series

Re: Photon Emission

Re: Ions