can you boil water at room temp. with a vacume?

Answer 1

Yes.

Under a vacuum (pressure above the liquid at / near zero), water will boil into a vapor even at temperatures well below 'room-temperature'.

Look at the phase diagram for water:
http://www.lsbu.ac.uk/water/phase.html
It charts the physical state the water is in as a function of temperature and pressure.
You can see that at zero pressure, water is a vapor at any temperature over about 200 K (-73.15 degrees C).

Of course, once the water starts to boil, it wont remain a vacuum very long. The water vapor going into the gas state will fill the void and exert a pressure over the water. The water's own pressure (vapor pressure) will continue to rise until the water stops boiling. So in order to keep the water boiling under the vacuum, you need to continually pump out any vapors.

At a temperature of 25 degrees C (about 77 degrees F), water has a vapor pressure of about 23.76 mm Hg, meaning that water will begin to boil at 77 degrees F if the pressure is lowered to .031 atmospheres of pressure.
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/watvap.html

Answer 2

WIth a vacuum cleaner? Or in side of a vacuum. A vacuum is the ideal condition, I'm certain the the boiling temperature of water would lower but.....70 Degrees F is pretty low. 212 F is Boiling temps. Remember that a vaccum will lack objects that reflect heat sources, my guess would be No!

Answer 3

The boiling point of a liquid is defined as the temperature at which the vapour pressure of the liquid equals the atmospheric pressure. Here, we are thinking of vacuum, which will lead to reduction in pressure to almost zero or so. As the liquids have some vapours at every temperature, so by creating vacuum we can boil water at room temperature also. One typical example is the low boiling point of water at mountains which creates problem in cooking the things.

Answer 4

Absolutely, the trick is to lower the absolute pressure below the vapor pressure of water at room temperature.

As the top layer of water evaporates the top layer of water will cool to the new lowered boiling point of water as the water below the surface will continue to absorb the surrounding heat and continue to boil.

At a lower temperatures you will reach a region where liquid water won't exist and ice will sublime directly into vapor, but that is much colder than room temperature.

Answer 5

Than. You recommend if I take water a million diploma from boiling and stick it right into a freezer and on the comparable time take a pan of room temperature water and detonate a one hundred megaton H-bomb a million foot away, which might boil speedier? Or do you recommend if I take the comparable 2 pans of water and place them on a 300 diploma floor, which might boil speedier? you are able to desire to ask?

Answer 6

Yes. Air in water will agitate the water to some extent. But convection needs difference in temp.

Answer 7

sure, as long as the room temperature is 100 degrees C.

Answer 8

if u will be with us . we will try on your self cose we need some boddy avility in the room . while we r doing that

Answer 9

if the vaccuum is strong enough and the seals are tight

probably

Answer 10

y waste ur time- ven there's a hundred more imp thing to do anyway!