Re: what is the evaporating temperature of water?

"N:dlzc D:aol T:com \(dlzc\)" <dlzc1@xxxxxxx> wrote in news:WKF6j.2352
$mF1.2137@xxxxxxxxxxxx:

Dear bz:

"bz" <bz+spr@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:Xns9A008168DE811WQAHBGMXSZHVspammote@xxxxxxxxxxxxxxxxx
"Martin Hogbin" <goatREMOVETHIS123@xxxxxxxxxx> wrote in
news:KMudncW5s-TqA8fanZ2dnUVZ8q2dnZ2d@xxxxxx:

n common with all other liquids, water has a vapour
pressure which depends on its temperature. At
30 C the vapour pressure of water is about 4.4 kPa
which is less than the atmospheric pressure of
around 100 kPa so some water evaporates and
becomes part of the atmosphere.

As long as the PARTIAL pressure of the water
vapor in the air is less than the vapor pressure
of the ICE(or water), water will continue to evaporate.

The TOTAL atmospheric pressure plays a part in
BOILING, but NOT in evaporation from the surface.

Dry ice goes from solid to gas, skipping the liquid
state because our total ATMOSPHERIC pressure
is below the vapor pressure of liquid CO2.

In a reduced pressure situation, like on the moon,
an ice cube would act just like dry ice does here.

That behavior is called "sublimation".

Correct. Evaporation of a solid, or the melting of a solid, directly from
solid to vapor without passing into a liquid state is called sublimation.






--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+spr@xxxxxxxxxxxxxxxxxxxx remove ch100-5 to avoid spam trap
.

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