Valgaaf - Today at 3:41 AM
How does the amount of salt in water impact the process of boiling?
@Mamue, IIRC, you are an expert with Chemistry(edited)
defan752 - Today at 3:42 AM
http://www.chem.purdue.edu/gchelp/solutions/eboil.html
Valgaaf - Today at 3:43 AM
so, the more the salt, the longer it takes to boil?
defan752 - Today at 3:44 AM
Yes
Valgaaf - Today at 3:44 AM
thanks
Mamue - Today at 3:45 AM
I'm far from an expert, I only considered between IT and chemistry for uni.
there are two factors involved, iirc.
one is that by adding salt you raise the temperature it needs to boil, but at the same time, as it is a solute (is this an English word?), the energy to heat it by 1°C is lowered thanks to being a solution
defan752 - Today at 3:45 AM
Solute is an English word
As opposed to solvent
Mamue - Today at 3:47 AM
but the salt you add for cooking pasta is added more for the taste of the pasta, and only second for the easier boiling
defan752 - Today at 3:47 AM
TL;DR: Boiling point is defined by vapor pressure. Boiling is the water molecules overcoming vapor pressure in order to change phase and become gas(edited)
Valgaaf - Today at 3:47 AM
Also, pure water would be an electric isolator, as it does not have the particles that would pass the electricty?
defan752 - Today at 3:48 AM
Particles = ions
Mamue - Today at 3:48 AM
it's not a total isolator, is it? it's only extremely difficult for electricity to pass?
defan752 - Today at 3:48 AM
Electricity needs ions to conduct
Mamue - Today at 3:49 AM
right..
defan752 - Today at 3:49 AM
Pure water is deionized
Mamue - Today at 3:49 AM
see Val, Defan knows way more than I do xD(edited)
defan752 - Today at 3:51 AM
To answer your question about the insulator
My physics knowledge is poor
Mamue - Today at 3:51 AM
i meant that for H20 to ionize, you'd need a fuckton of energy
defan752 - Today at 3:52 AM
But with pure water, it cannot dissociate into its ions H+ and OH- due to the law of autoionization of water
Mamue - Today at 3:52 AM
there we go, i knew there was something i missed
defan752 - Today at 3:52 AM
This is because of hydrogen bonding and polar covalent bonds in the H2O molecule
You can change this completely by adding something like salt
Which will dissociate into ions
Giving the electricity something to bounce off of
Pure water will act as a resistor: "eating" any electrical energy applied to it and converting it to thermal energy
The water will become hot
Mamue - Today at 3:55 AM
gosh, it's been over 6 years since I last had chemistry lessons..
Kazumi - Today at 4:01 AM
Well, the "the boiling point is higher" is only part of the equation. The amount of energy needed to increase the temperature of your water-salt-solution decreases the more salt you put in.(edited)
Mamue - Today at 4:01 AM
that's what i said as well :)
Kazumi - Today at 4:01 AM
Sorry, I skipped over most of it, apparently.
Mamue - Today at 4:02 AM
it was my very first message, no worries lol