Hey @S007: You wanna give me that lecture? :-P

Oh well.

@Kaumudi Sure ..wait a min

Evaporation is a phase transition from the liquid phase to vapor (a state of substance below critical temperature and critical pressure) that occurs at temperatures below the boiling temperature at a given pressure. Evaporation usually occurs on the surface. Evaporation may occur when the partial pressure of vapor of a substance is less than the equilibrium vapour pressure.

Boiling is a phase transition from the liquid phase to gas phase that occurs at or above the boiling temperature. Boiling, as opposed to evaporation, occurs below the surface. Boiling occurs when the equilibrium vapour pressure of the substance is greater than or equal to the environmental pressure. For this reason, boiling point varies with the pressure of the environment. Evaporation is a surface phenomenon whereas boiling is a bulk phenomenon.

When you lower the external vapour pressure actually the boiling point as a whole decreases like in mountain areas

If you decrease the pressure drastically, the BP may even fall by 20-30 degrees

Dude, the heck is ur point?! Ik all this! >.<

But evaporation occurs at all temperatures even if surrounding pressure is not equal to vapour pressure

Yes, it does!

So, when you decrease the vapour pressure to such an extent that the whole liquid can vapourize that is boiling point

and boiling

don't call that evaporation

because for evaporation vapour pressure is not necessarily equal to surrounding pressure

Secondly, I didn't say that boiling=evaporation!

Okay, answer me this-what happens first, evaporation or boiling?

What do you mean by first ? Evaporation is something that happens always

in liquids

By first, I mean, according to how this works, clearly, molecules of the liquid come away by breaking intermolecular forces b/w other molecules and themselves and occupy the space above the liquid. This is evaporation. Clearly, this happens before the entire liquid begins to boil, yeah?

yes

JR said that this process, wherein the vapours form is equivalent to boiling. Okay this is what he said:

Notice the "i.e"

I had a problem with that part, not the "a liquid boils if the pressure is lower than its vapour pressure" part.

Yes, so ? Evaporation and Boiling are two different methods of vapourization. Also notice "if the pressure is lower than its vapour pressure" ....which clearly implies it is boiling and not evaporation

@S007 Aii. I only pointed out that the "i.e" was out of place. By placing that "i.e" over there, he was saying that a liquid turning into vapour=boiling, which is not always the case, since vaporization can happen even via evaporation, wherein the entire bulk of the liquid isn't involved, as in boiling.

Dyou see how this is nothing but plain miscommunication?

Sure, yeah.

Boiling can definitely be induced by pressure changes also.

You said vapourization induced by pressure change is evaporation

That was my objection

Vaporization induced externally by pressure change is boiling

@Kaumudi

You've cut out the important parts of that ^ conversation.

I said:

And then u said:

And to that claim of urs (I thought u were telling me that all kinds of vaporization is boiling), I said:

John never said turn into vapor = boiling, He said "A liquid boils, i.e. turns to vapour, if the pressure is lower than its vapour pressure. " ....of course "A liquid evaporates i.e. turns to vapour at all temperatures" holds equally good.

But I certainly didn't mean to negate the fact that boiling can be induced by pressure changes too, which I knew it can but perhaps it sort of came across as me not accepting that fact.

When I said "that" I meant "A liquid boils, i.e. turns to vapour, if the pressure is lower than its vapour pressure. "

@S007 Oh. My. God. Dude! The only problem I have is with the placement of that "i.e" over there!

Okay, lets end this

:-P

Enough

It was really stupid :-P

LOL ;-D

Yes, please. This is clearly miscommunication on both of our parts and it's now become clear that there is nothing to be learned. Also, I don't mind if I come across as being wrong. If there's s'thing to learn, I'm all for it but there's nothing here so I don't want to spend more time attempting to force my "rightness" upon you, because again, there's been a miscommunication. I think we both know what we're talking about, thank God :-)

@Kaumudi Ok done ! STOPPED !

Okay. Toodles! :-)

@JohnRennie Oh, Ikr? :-P

I'm feeling so tired after this XD

And what the heck, @DanielSank has been online literally all day and all night! Are u okay? O.o

Bye and goodnight people !

Night :-)

@Kaumudi tata...bbye..alvida ! _/\_

xD

@JohnRennie :-P Oh, sorry about that. But hey, don't u speak about short forms! You guys say stuff like "IMHO" and "IIUC" and I had to go and Google all that :-P

Honestly, I still dunno what that is ^

And I'm 17 so I qualify as one of the "kids" from "kids these days", right?

(:-P)

My grandma is 55...

Whoa, there are these things where they mix Harambe with the Trolley problem!

Okay, the internet is truly a very weird (but wonderful) place.

This is what I meant ^

Whoa, that cat sounds vera level, as we would say :-P

@DanielSank U've been online for the past 12 hours.

@KyleKanos True that.

@DanielSank That was why I asked if u were okay.

OhmGod, he drew himself as Calvin's dad?!

Didn't know that!

@JohnRennie OHHHMYGOD!!!

How much will u sell it for?

@Slereah ALL of it?!

@JohnRennie Ohh, okay .__.

I see...

Anyway, I'm off! Night! :-)