On Sunday, February 25, 2018 at 10:06:03 PM UTC-5, Ed Pawlowski wrote:
> On 2/25/2018 4:13 PM, wrote:
>
> >
> > I'm not sure what folks mean by "steaming". It's not possible to
> > produce steam except in a sealed pressurized container like a pressure
> > cooker. Cooking veggies in an unsealed container with a bit of liquid
> > is NOT steaming, that's boiling/stewing. What's seen escaping from a
> > boiling pot is water vapor, NOT steam... steam is invisible.
> >
>
> Right, what you see is water vapor. It is when the steam you produced
> condenses. When you heat water to 100C is changes from from liquid to
> vapor, called steam.
>
> The energy or heat consumed per unit mass during the vaporization of a
> liquid is called heat of vaporization or enthalpy of vaporization. To
> condense water vapor to its liquid phase, energy must be removed from
> the gas. The energy per unit mass required to condense water vapor is
> equal to the heat of vaporization.

Perhaps true in the strictest technical sense, but we're not talking
in that way.

Does your bathroom mirror ever steam up?

Cindy Hamilton