The Periodic Table

user116211

02:59

@Martin-マーチン: Hi!

user116211

@MadScientist: >.<

user116211

@pH13: \o

user116211

@ItachíUchiha where? What solvent?

IͶΔ

07:41

@ItachíUchiha In water?

Also welcome to the Table @Itachí!

And welcome back @Ringo!

ringo

Thank you @IͶΔ

IͶΔ

Sheesh, I should make people write a bot for this.

ringo

Long time no see

IͶΔ

Indeed; how're you doing?

ringo

Alright... just finished writing up a physics lab report

So I'm glad that's done with

I exponentially prefer writing about chemistry

How are you?

IͶΔ

07:43

I'm about to go for some biking.

I haven't biked for a @Loong time.

ringo

How exciting!

Lol

Lool*

Check your tire pressure before you head out!

IͶΔ

It's never been satisfactory. It's either too much or too low.

ringo

That's life

IͶΔ

So anyway what's the news?

ringo

News on what?

IͶΔ

07:45

On everything.

ringo

Well, it's never been worse, but it's also never been better

I don't mean me

IͶΔ

Oh, equilibrium.

ringo

I just mean the universe

I started working in an organic chemistry lab

So that is exciting for me

IͶΔ

Yay!

OK GTG. Cya later

ringo

Have fun!

CopperKettle

07:55

I wonder where I can find a scientific article (a real journal article) on chemistry to translate for my translation courses, so that it would be at least partially comprehensible to me and somewhat interesting.

I usually take biotech articles, but a chem article would be a nice distraction

Maybe some in-depth explanation of a common concept.

ringo

Hmm...

CopperKettle

(off to the courses)

ringo

One of the most popular answers I wrote was about why ice is slippery

That really does seem to be the key to popular questions on chem.SE is just really common things that you might ask yourself

anyway

See for yourself if it is something you might be interested in

I hope it can be of use to you

@CopperKettle

pH13

09:04

@CopperKettle maybe the journal of chemical education could give you some interesting articles

IͶΔ

09:17

I wanated to know how does the electrons spin in an atom. I mean what does it look like when the electrons spin... The theoretical models shows how they spin... But i wanna know how do they looks like when they spin — Pavel Mahmud Ratul 3 mins ago

"I'm eating an apple but I wanna know what it looks like to eat an apple."

Wildcat

:D

IͶΔ

\o @Wild kitty

Wildcat

Hi!

IͶΔ

How're you doing? Long time no chat

Wildcat

Too busy. :(

IͶΔ

09:22

Me too. :(

@Cop translate this one:

24

A: What causes the old book smell?

This is a very interesting question. Provided that the materials used in making papers aren't the same around the globe, this is a very broad case of study. However, a study has been conducted in which the main goal was to identify the compounds that are the cause of the smell; VOCs: Volatile...

IͶΔ

09:52

The Researchgate article is awesome.

pH13

10:03

@IͶΔ you mean "long time no cat"

IͶΔ

Yes, those two sentences are in resonance.

pH13

don't let @Martin read this he is not in resonance with resonance stuff

IͶΔ

@Martin don't read this.

Now what are the chances that he'll read? 105%.

Martin - マーチン

ಠ_ಠ

IͶΔ

ಠ_ಠ

pH13

10:16

:D

Martin - マーチン

@IͶΔ would you care to include a full reference?

IͶΔ

@pH13 Don't break the chain! (/¯◡ ‿ ◡)/¯ ~ ┻━┻

Martin - マーチン

┬─┬ ノ( ^_^ノ)

IͶΔ

@Martin-マーチン I'm not good at this citation thingy. By all means, edit and include it as you please.

Martin - マーチン

@IͶΔ time to learn!

IͶΔ

10:20

Meh

My PhD thesis is in 13 years or so.

Martin - マーチン

you can remove that downvote then ;)

IͶΔ

:O

Downvotes @Mart

Martin - マーチン

lol...

IͶΔ

OK so now what should I include?

pH13

I wonder what user15489 is doing now

IͶΔ

10:22

ISBN?

DOI?

@pH13 Riding a kangaroo

pH13

isn't there our wonderful meta thread about citing stuff?

@IͶΔ great

IͶΔ

@pH13 There is, but Chromium will explode if I open a new tab.

Oh, I just found a tab I could kill

> Author 1; Author 2; Author 3; etc. Title of Article. Journal Abbreviation Year, Volume, Inclusive Pagination.

You gotta be kidding me

pH13

that's the usual way for papers

IͶΔ

Hydroxyl TY @Mart

I was about to edit it though.

Martin - マーチン

;]

i was faster

IͶΔ

10:27

@Martin-マーチン German wink? (/¯◡ ‿ ◡)/¯ ~ ┻━┻

Martin - マーチン

┬─┬ ノ( ^_^ノ)

IͶΔ

It looks like when Arnold suddenly comes out of an explosion.

How redundant is "horribly terrible"?

chemistry.stackexchange.com/questions/44971/… -- "redaction" LOL

user116211

11:29

@IͶΔ: o/

user116211

@Martin-マーチン: check this:

user116211

lancoude.com/stag/hybridization-of-atomic-orbitals

user116211

I was amazed at noticing two of my questions I asked here at Chem SE. I mean how can they use it at their own site? Without naming Chem SE?

user116211

lancoude.com/…

user116211

^ See this question

user116211

11:42

And this is the question (original) I asked here:

user116211

1

Q: How is a molecular orbital a 'quantum superposition' of the atomic orbitals?

Let me quote from Feynman's lectures the concept of superposition: (1)The probability of an event in an ideal experiment is given by the square of the absolute value of a complex number $ϕ$ which is called the probability amplitude: $$\begin{equation} \begin{aligned} P&=\text{probability},\...

user116211

@Martin-マーチン What is going on?

Martin - マーチン

hmmmm.... i'll have a look

user116211

@Martin-マーチン Aren't they violating the copyright? I'm not a legal expert but this is unethical!

Martin - マーチン

yes they seem to violate it

user116211

11:46

@Martin-マーチン Now, how to sue them? They don't even bother to pronounce Stack Exchange

Martin - マーチン

can you give me some time to look into it please :D

user116211

@Martin-マーチン ya sure; sorry for yelling ;P

Martin - マーチン

np ;)

user116211

@IͶΔ: o/

Martin - マーチン

ha.... @user36790 I found it:

255

Q: A site (or scraper) is copying content from Stack Exchange. What do I do?

Since day one of Stack Overflow, all content posted on Stack Exchange sites by their users (i.e. you wonderful people) has been provided to the whole universe under the CC-BY-SA license. For my fellow non-lawyers, that license basically means: Anyone can use any Stack Exchange posts at any time...

discussion faq attribution copycat-sites screen-scraping

user116211

11:59

@Martin-マーチン: Nailed it!

Martin - マーチン

In short, since this is one of those cases, go to chemistry.stackexchange.com/contact

choose the option from the drop down and enter the links and a short description

The company will take care of that.

user116211

@Martin-マーチン They asked to provide the link.

user116211

Main page or the page where my question is?

user116211

@Martin-マーチン: There are actually all of my questions on quantum chemistry I asked!!

user116211

@Martin-マーチン: what is search terms?

Martin - マーチン

12:07

user116211

O.O

Martin - マーチン

provide as much information as you can remember, so that the company can reproduce it

user116211

@Martin-マーチン lancoude.com

user116211

only this?

Martin - マーチン

no. file them for an explicit example, like you told me above

user116211

12:09

Or lancoude.com/…

Martin - マーチン

tell the devs, how you found that site

user116211

^ get it

IͶΔ

@user36790 \o

@User6 I thought Santiago was here. :(

@Martin-マーチン Nice one.

Martin - マーチン

;)

user116211

@Martin-マーチン there are many links actually as they have ripped all questions of mine; shall I have to post everyone?

Martin - マーチン

12:12

do it for one and enter in the optional field, that they rip off more

as long as the company is aware of the site they will take appropriate action

IͶΔ

Actually, since it's red, I'd've used some MAR™ humor, but anyway, I have something to link to next time.

@user36790 No, one is enough.

user116211

@IͶΔ thanks

IͶΔ

I once (twice?) reported a scraper.

After a couple of days, they sent an email to the address I provided.

Martin - マーチン

i think the last time i encountered it, jonsca took care of the proceedings, as he found the same thing

IͶΔ

> Hello,
Thank you for reporting this content. I’ve passed the information along to the person at our company who handles such issues. It’s the diligence of users like you that helps us stay valuable!
Please note, bringing these sites into compliance (or getting them to no longer serve our content) is often a long and arduous process. You may not see immediate results. However, rest assured that we’re working on it.
Thank you again,
The Stack Overflow Team

At least the template response doesn't suck. :P

Martin - マーチン

12:18

it's actually quite good, like most of the templates they have here... thoroughly optimised

user116211

> While googling, I got that scrapper. I couldn't ever imagine that I would notice many of my questions on quantum Chemistry, Molecular Orbital Theory etcetera I asked at Chem SE. They didn't even bother to attribute Chem SE . This is really unethical and strong actions should be taken against such damn theft works. I condemn this horrendous act. Please take stern steps. Thanks.

user116211

^ Would I post this?

IͶΔ

Nah, it's redundant.

user116211

@IͶΔ :(

IͶΔ

It's like repeating your report in the custom field.

You are reporting because it's a horrendous act and you condemn it.

You are reporting because they scraped content.

And you are reporting because they didn't attribute.

user116211

12:20

@IͶΔ I'll modify it.

IͶΔ

Here's what my custom field contained:

> **Search terms:** Jon Skeet will put some ice on his wrists. That was a lot of typing.
**Free text follows:**
What I searched is actually an answer to this question on meta.SE: http://meta.stackexchange.com/questions/31134/what-will-happen-when-all-the-possible-answers-are-given-to-all-possible-questio I wanted to see where else the word of this fun question was spread, and well, it seems they scrape even meta.SE content.

user116211

@IͶΔ got it.

user116211

@IͶΔ Jon Skeet is an AI

user116211

> Hello,
I was searching on Google about hybridisation and superposition and all that. When I gazed at the result of the search, that site alluded me ultimately to notice that many of the questions I asked at Chem SE on that same topic were scrapped without even bothering to attribute `Chemistry Stack Exchange`. Do check that.

user116211

Search terms: hybridization quantum superposition

user116211

12:28

@IͶΔ: ^

user116211

Is it right?

IͶΔ

@user36790 Nice

user116211

@IͶΔ I'm always great!

IͶΔ

ᕙ(⇀‸↼‶)ᕗ

user116211

@Martin-マーチン: Submitted!

user116211

12:34

@IͶΔ >,<

IͶΔ

Is that an angry owl?

user116211

@IͶΔ yep!

user116211

3

A: What are the functions of these coefficients $c_1,c_2,c_3,c_4$ in $ \psi_{sp^3}= c_1\psi_{2s}+ c_2\psi_{2p_{x}} + c_3\psi_{2p_y}+ c_4\psi_{2p_{z}}$?

Yes, hybridization is superposition. Assuming the basis functions are orthonormal, which we usually take to be the case, $\langle\phi_i\,|\,\phi_j\rangle = \delta_{i,j}$ the condition for normalization of $\psi$ is that the sum of the squares of the coefficients equal unity. More precisely, $$c...

user116211

@Martin-マーチン: Are s, p, d,f orbitals orthogonal?

IͶΔ

I'd recommend not talking about hybridization. @Mart would ban anyone who talks about it.

user116211

12:36

@IͶΔ O.O

user116211

12:47

@Martin-マーチン @IͶΔ: Got the mail.

IͶΔ

12:57

Whoa, that's fast.

Martin - マーチン

automagic it is.

user116211

@Martin-マーチン hahaha

user116211

I'm not getting are s, p d orbitals orthogonal?

IͶΔ

@user36790 Yes.

user116211

@IͶΔ will you be banned?

IͶΔ

13:01

@Mart cannot ban me.

user116211

@IͶΔ O.o

Martin - マーチン

i can... but not without reason

IͶΔ

"i can... but not without reason" = "i can't"

esp. with that uncapitalized I.

user116211

@IͶΔ epic lol

user116211

@IͶΔ: Remember the thermodynamic debate among me, you and mithoron?

IͶΔ

13:03

Whoa, since when is it called a debate?

user116211

Well, I think I've found out a solution.

user116211

@IͶΔ You can name it anything.

IͶΔ

I've found a solution too: Air.

user116211

:27853656

user116211

Wanna hear?

IͶΔ

13:04

O'course.

user116211

Well, wait; I've to go to toilet

IͶΔ

WAITING TIME SET TO 5 MINUTES

user116211

@IͶΔ feeling fresh ;P

IͶΔ

You have been reborn.

user116211

@IͶΔ: So, the first law is dU= Q-W

user116211

13:11

W does not mean only PdV work

IͶΔ

Go on.

user116211

$$W= \sum Y\mathrm dX $$

user116211

where $X$ is the configuration of the system

user116211

This includes PdV work along with other non-expansion work

user116211

$$W= P\mathrm dV + \underbrace{w'}_\textrm{non-expansion work}$$

IͶΔ

13:16

That brace looks like a nice mustache.

user116211

So, that means $$\mathrm dH =\mathrm dH = \underbrace{w'}_{\textrm{non-expansion work}} + \delta q $$

user116211

at const. temperature and pressure

user116211

@IͶΔ yep

user116211

@Martin-マーチン: Thanks for the edit

user116211

And so, it is wrong to write $$\mathrm dS_\textrm{surr}= \frac{-\mathrm dH_\textrm{sys}}{T}$$

user116211

13:18

This is only true provided $w' = 0$

Martin - マーチン

np... ;) Okeeee... i'm off to the weekend

user116211

Using Second Law, we get \begin{align}W_T & \le (U_1- U_2)- T(S_1-S_2)\\ \implies W_T & \le (F_1 -F_2) \end{align}

user116211

or $$w' \le (U_1- U_2)- T(S_1-S_2) + P(V_1 -V_2)$$

user116211

which means $$w'\le (G_1 - G_2)$$

user116211

And that means $$G_1 \ge G_2 + w'$$

user116211

13:22

This implies $$G_2 < G_1$$.

IͶΔ

@Martin-マーチン \o

user116211

This tells us that Gibbs energy decreases when the entropy of the universe increases

user116211

But it is not true to write $$\mathrm dG = -T\,\mathrm dS_\textrm{uni}$$ which is true only when $$\mathrm dH= q$$

user116211

That is when $w' = 0$.

user116211

@IͶΔ: Like it?

IͶΔ

13:25

Aha.

I can die happy now.

Makes sense.

user116211

@IͶΔ So, the chem book of Peter Atkins has the mistake of taking enthalpy change of the system as the heat transferred to the surroundings. This is only true when the non-expansion work is 0.

user116211

@IͶΔ Thanks for the nod.

user116211

@IͶΔ: As I said, I'm always great; it feels amazing to learn from mistake ;P

user116211

@IͶΔ: If Mithoron could see it ;/

user116211

@Mithoron: When you come, do check my argument above.

IͶΔ

13:30

He would.

user116211

@IͶΔ I hope I'm correct now.

IͶΔ

I hope you're correct now.

user116211

@IͶΔ \o/

user116211

@IͶΔ I just mean how could chem books miss that?

IͶΔ

They miss stuff usually on purpose.

How many chem books do you see still show the atom like the solar system?

user116211

13:34

@IͶΔ I mean it's undergrad text;

IͶΔ

Exactly. That's why.

user116211

i could get sense of those only after reading a Physics Thermodynamics

user116211

@IͶΔ The whole physical chemistry: be it chemical equilibrium or kinetics depend on this single equation $$\mathrm dG = -T\,\mathrm dS_\textrm{uni}$$. And they use this equation along telling $w' \ne 0$. WTF!

user116211

@IͶΔ: BTW, can you tell how to view mathjax in the chat?

Aditya Dev

7

Q: Why do some gases have lower value of Z for a particular pressure?

In the above graph,the minima of the curve for methane is more than that of nitrogen. Also, for a given value of pressure, the value of $Z$ for methane is less than that of nitrogen. They seem to meet at high pressure. Why do some gases have lower value of Z? The same thing is observed if you ...

gas-laws

user116211

13:38

@AdityaDev: Indian?

Aditya Dev

Yes

user116211

@AdityaDev High school or ?

IͶΔ

@user36790 A minute

@user36790 Low school

Aditya Dev

In the above post, I tried to get the Z vs P graph using real gas equation. But it does not make sense. What am I missing?

user116211

@IͶΔ Awesome!!

Aditya Dev

13:39

@IͶΔ how can f(Z,P) be cubic?

IͶΔ

11

Q: MathJax in chat (ChatJax offshoot)

This is an offshoot of ChatJax, which enables MathJax along with mhchem on chat. Copy the text below: javascript:(function(){if(window.MathJax===undefined){var%20script=document.createElement("script");script.type="text/javascript";script.src="https://d3eoax9i5htok0.cloudfront.net/mathjax/lat...

discussion mathjax chat

Make a bookmark of the code in Mart's answer.

i.e. the address of the bookmark should be Mart's code.

Then, enable the bookmarks tab in your browser and any time you wanted to turn it on, drag the bookmark to the tab.

Aditya Dev

@user36790 high school

user116211

@AdityaDev std xi or xii?

Aditya Dev

13

user116211

@AdityaDev oh!

user116211

13:43

@IͶΔ I have copied the code

Aditya Dev

Repeater

IͶΔ

@AdityaDev Wait, lemme get into the context

user116211

@IͶΔ: Pasted in the bookmark bar

user116211

Now?

user116211

@IͶΔ: Hurrah! I did it!

IͶΔ

14:02

Yay!

Sorry, am a bit busy ATM

user116211

evey day i wake up early in the morning

Itachí Uchiha

@user36790 Water

Yes,The solvent is water.

Thanks :)

user116211

14:30

Have I written this?

user116211

19 mins ago, by user36790

evey day i wake up early in the morning

user116211

WTF!

IͶΔ

@ItachíUchiha What do you consider the "why" to be?

It's because according to those guidelines, Cu compounds are generally insoluble in water.

And that would be because Cu-Cu metallic bonds are too strong.

Oh wait a minute, you're talking about CuCl2, not Cu.

pH13

@IͶΔ and there are many Cu-Cu-bonds in CuCl?

was what I wanted to anser you next

IͶΔ

Oh shush

Is it CuCl and not CuCl2? Oh screw this

CopperKettle

14:37

@pH13 Thank you, I'll look into it. (0:

CuCl-Ox-Clan

IͶΔ

OK, again the same boring stuff goes.

pH13

there was a user in g-block mentioning that the only thing thing (s)he knows in german would be "mein kamph" ... I would have accepted nearly everything else as Autobahn, Schnitzel, Bratwurst ... but it has to be this book ... quality is about the same as CC's comment there

IͶΔ

CC?

pH13

CopperKettle with CuCl-Ox-Clan

CopperKettle

Ah, cheer up.

Comments should not be always high hat.

pH13

14:43

@IͶΔ thank you for give me the opportunity to write out what I wanted to abbreviate ʕノ•ᴥ•ʔノ︵ ┻━┻

IͶΔ

@pH13 ┬─┬ ノ( ^_^ノ)

So why do you hate this "Main kiloampers per hour" book @pH13?

pH13

@IͶΔ just to be sure, you know which book is meant?

IͶΔ

Yeah, but I won't hate a book because I hate its author.

I read that their is para, ortho, and meta position in aromatic ring and I read one of good properties of aramid relates to it's para position of molecules in aromatic ring, so does the para position relates to good properties? Is it due to cloaing the chains togeter? Thanks — studentrr 44 secs ago

Facepalm

pH13

good ... then I did not say that I hate this book :D I just wrote that there is so much more that one could know in german than the name of this book ^^

IͶΔ

Like "ich".

pH13

14:48

i.e.

IͶΔ

Or that cool Beta letter you have.

CopperKettle

One could know all the languages.

pH13

ß <-

IͶΔ

Ja

CopperKettle

velleight

pH13

14:49

:D

vielleicht <-

IͶΔ

Danke

pH13

Bitte

CopperKettle

Morgen, morgen, nur nicht heute

IͶΔ

@CopperKettle vellnine

CopperKettle

Zagen allen faulen leute

That's about all I know. (0:

pH13

14:49

*Sagen ... but indeed

IͶΔ

in g-block elements, yesterday, by defcon2

mein kamph (this is all the german I know)

LOL

pH13

thx for bringing it here xD

IͶΔ

I'm gonna pin that to annoy @pH13. (/¯◡ ‿ ◡)/¯ ~ ┻━┻

pH13

well, thank you very much

IͶΔ

Oof, that's bitterer than "F*** you"

pH13

14:52

it was even wrong ... it is "mein kampf"

IͶΔ

Yeah

It's kiloampers per feet.

pH13

xD

what's the typical german name that you know?

IͶΔ

@Martin

Oh wait actually no, lemme think.

Martin - マーチン

Klaus

pH13

@Martin you are biased

CopperKettle

14:55

@pH13 Karl?

IͶΔ

August

Oh yeah, Karl too.

CopperKettle

Martin..

Karl is cognate with "churl", AFAIK

IͶΔ

Curtis

Dale

Ludwig

CopperKettle

> Old English ceorl "peasant, freeman, man without rank," from Proto-Germanic *kerlaz, *karlaz (cognates: Old Frisian zerl "man, fellow," Middle Low German kerle, Dutch kerel "freeman of low degree," German Kerl "man, husband," Old Norse karl "old man, man").

pH13

my grandpa's name is Ludwig ^^

IͶΔ

14:57

Jarvis

CopperKettle

@pH13 My grandpa's name is Pyotr (Peter), and the other's is Alexander. (0:

pH13

russian version of names are funny

the best version of timothy that I saw these days was timofy

CopperKettle

"Timofey"

pH13

or timafy ... don't know

IͶΔ

:o @Cop your grandpa used to plunder some countries.

CopperKettle

14:59

My name is "Artyom", derived from Greek "Artemis"

IͶΔ

Ingelbert

pH13

Engelbert

CopperKettle

@IͶΔ No, he was not ranked high enough

IͶΔ

Manfried

Transcript for