Why is Vap cool when you exhale it?

[rcalvy1]

Hi guys,

Just wondering why is the vapor cool when you exhale it?

 

[VaporDaze]

Evaporative cooling would be my only guess!

 

[Chuck64]

The vapor isn't cool, you are!

 

[rcalvy1]

The vapor isn't cool, you are!

Lol

 

[DebiK]

The vapor isn't cool, you are!

Yes!

 

[Scotticus93]

I think it's the vapor condensing on your skin. But hey. What do I know?!

 

[crxess]

e·vap·o·ra·tive cool·ing
noun
noun: evaporative cooling

1. reduction in temperature resulting from the evaporation of a liquid, which removes latent heat from the surface from which evaporation takes place. This process is employed in industrial and domestic cooling systems, and is also the physical basis of sweating.

Vapor continues to cool until gone.

 

[crisisady]

Because it contains water vapour. And water vapour will grab heat from any surface which you blew at.