So, when I mix water I occassionanally add a handful or so of salt at the end to get it right - so why does the salt get hot in my hand when it begins to disolve?

the Calcium chloride and magnesium chloride in the salt mix heat up when they come in contact with water.

Sodium hydroxide does the same.

And so does pure sodium. Do a search on Youtube.

so does hot ice have heaps of fun with that,just got to keep it cold enought

Hot ice?

lol just testing

lol

u mean dry Ice? Solid CO2?

u mean dry Ice? Solid CO2?

Dry ice lumps killed my hand

But yeh it feels like a burn

HaNs, Your suggestion that you know you wrote about, is an absotue NO-NO.

You should have more sense to put this onto the forum.

MOD - ALAN

well technically its because its an exothermic reaction in breaking up the bond between calcium and carbonate so there is an overall release of energy, in this case in the form of heat

yea im 3rd year bsc in chem... haha

did that is first year Chem!

HaNs, Your suggestion that you know you wrote about, is an absotue NO-NO.

You should have more sense to put this onto the forum.

MOD - ALAN

Its not illegal

So i dont see a problem

MEH

:roll:

well technically its because its an exothermic reaction in breaking up the bond between calcium and carbonate so there is an overall release of energy, in this case in the form of heat

yea im 3rd year bsc in chem... haha

Thanks SBD, that explain it nicely.