Is there a chemist in the room?

[Giraut]

I'm curious: when glycerin binds to water, is it endothermic or exothermic?

I'm asking because when I blow a big cloud very slowly and put my hand through it, it feels slightly cool, despite coming from my warmer lungs. However, I seem to recall from school (many, many years ago ) that a hydroxyl group hydrogen-bonding to a water molecule should be an exothermic process.

Anybody knows?

 

[samjoseph1024]

oh my poor knowleage...cannot help you

 

[BoomStick]

Pretty sure the vapor is pulling heat out of your hand faster than the surrounding air making it feel cool. Kinda like a swamp cooler.

 

[Giraut]

Ah yes, I didn't think about that. It makes sense. Thanks!

 

[Warhawk-AVG]

Pretty sure the vapor is pulling heat out of your hand faster than the surrounding air making it feel cool. Kinda like a swamp cooler.

Yup evaporative cooling, plus the motion of the air aids in removal of heat, like a nice cool breeze