The Periodic Table

Enthalpy is a mathematical construction, but exactly because ΔH = q (under certain conditions), it makes it much easier to measure ΔH than to measure ΔU. So I would hesitate to say that there is no "practical justification".

gateprep

yes but U is more trivial practically without the use of mathematics

orthocresol

1:11 PM

I don't know what you mean by that.

I'm also unaware of a Scwatz identity, I'm afraid.

gateprep

I mean I got you and I am pleased by your ans I didnt find any justification as clear as yours. Btw when do u generally remain online on this chatroom so that I can

get

orthocresol

It's tough to say, I come and go at odd times of the day and it generally depends on what I'm doing in real life. What I'd say is to just post your question, if anybody is able and willing to help then they will.

gateprep

Alright any mail id or facebook or any other profile that will help me to get in touch directly with u?

In case u r willing to share?

orthocresol

Sorry, but I'd rather keep that separate.

gateprep

Can u help me about maxwell realtions in thermo

orthocresol

1:15 PM

What about them?

gateprep

I would be happy if u forward some genuine link

It seems Hebrew to me..

I have tried again and again

I mean I dont understand anything of it...

orthocresol

I learnt my thermodynamics primarily from Levine's Physical Chemistry. I think part of the issue is that if you really want to understand thermo, multivariable calculus is a prerequisite.

gateprep

Ok but I don't find a good book for the same...

Gaskel is good but too much in detail

Can u suggest a book for multivariable calculus?

orthocresol

Levine has an introductory chapter on it which gives you enough info to apply it to the thermo. I liked that book partly because of that.

gateprep

Ok would u mind if I would tag u in the chat in case I would want an answer directly from u?

orthocresol

1:21 PM

You probably don't need to, if you post something I'll usually see it if/when I pop in.

gateprep

Alright I will do that then

2 hours later…

hBy2Py

2:55 PM

@paracetamol Yep! Most everybody in my classes did, actually.

Pretty sure I was one of the few to learn to program on theirs, though.

gateprep

@paracetamol What about Kerala are u all safe now?

gateprep

3:19 PM

@orthocresol

I am stuck up with the topic why we need to draw common tangents for delta G curves

What is the significance of common tangents

paracetamol

@hBy2Py Phew For a moment I was afraid I fell too far behind the times ;-P

@gateprep Yep. Thanks for concern O:)

The flood-water's receding \o/

gateprep

@paracetamol
I am stuck up with the topic why we need to draw common tangents for delta G curves
What is the significance of common tangents

I am happy that things are improving

paracetamol

@gateprep Ouch, that's not a part of my "expertise", sorry >_< (If I had been on earlier, I'd probably have helped you with the enthalpy-at-constant-pressure thingy) :3

gateprep

Alright not an issue..

paracetamol

Looks like you'll have to await ortho's divine intervention (again) O:)

@hBy2Py Ah yes, I don't think I've told you,

Kerala

Kerala () is a state on the southwestern, Malabar Coast of India. It was formed on 1 November 1956 following the States Reorganisation Act by combining Malayalam-speaking regions. Spread over 38,863 km2 (15,005 sq mi), it is bordered by Karnataka to the north and northeast, Tamil Nadu to the east and south, and the Lakshadweep Sea to the west. With 33,387,677 inhabitants as per the 2011 Census, Kerala is the thirteenth-largest Indian state by population. It is divided into 14 districts with the capital being Thiruvananthapuram. Malayalam is the most widely spoken language and is also the official...

^ I'm from here O:)

No biggie ~~Jan was the first person to know~~ ;-P

gateprep

3:27 PM

Yes @paracetamol u told me

LOL

a-cyclohexane-molecule

common tangents are important because otherwise you violate thermodynamic stability

Avnish Kabaj

@paracetamol is the malabari paratha from Kerala or Karnataka

Martin - マーチン

3:55 PM

@AvnishKabaj I think I have put you out of your misery of choosing ;) (At least for now)

Avnish Kabaj

4:12 PM

@Martin-マーチン waaa

The answer's been deleted

Thanks

paracetamol

@gateprep Yep O:)

@AvnishKabaj I don't know ._.

Martin - マーチン

Well... that was not my intention with the comment... but I guess that was the result anyway

Avnish Kabaj

@paracetamol you're no true keralite

orthocresol

A: Why does the hydrogen atom in HCl (when dissociated in water) bond to the oxygen rather than staying with the chlorine atom?

I’m going to answer to the posted question without reading all of the commentary. First, the answer should NOT be given in terms of electronegativity. I cannot go into detail here, but the failure of electronegativity theory to predict or explain that HI is a strong acid must not be ignored. ...

Another day, another crackpot.

Loong

I didn't try to read all of that.

Martin - マーチン

4:23 PM

> We know that HF is tetrahedral

I can't even...

a-cyclohexane-molecule

@Martin-マーチン i assumed it was referring to electron domains in F, but...

Martin - マーチン

yeah... that might be meant that way, but then it's wrong, too

2 hours later…

gateprep

6:21 PM

What is i(suffix) cod and E(suffix) cod in corrosion?

@a-cyclohexane-molecule

@a-cyclohexane-molecule Why are u saying so that not drawing common tangent will violate thermodynamic stability?

a-cyclohexane-molecule

@gateprep without drawing common tangents, your gibbs function is not convex. the common-tangent construction produces the convex envelope of the gibbs function, which is required for thermodynamic stability

gateprep

WHat does common tangent ensure..Does it ensure a common minima by any chance

What is its utility@a-cyclohexane-molecule

a-cyclohexane-molecule

@gateprep as i've repeated multiple times now, it ensures thermodynamic stability

@gateprep no

gateprep

Why on earth do we draw common tangents in a graph

forget about thermo@a-cyclohexane-molecule

a-cyclohexane-molecule

@gateprep to produce the convex (concave) envelope of a function

gateprep