How can water be brought to a boil without heating it?

Question

How can water be brought to a boil without heating it?

Answer 1

hmmm... this is pretty tricky. you may want to purchase a wand for this endeavor and utter the spell "Waterus Boilius"

Answer 2

apparently, you can lower the pressure of the surrounding area, so that the water will boil even in room temperature. i think this is because the lowered ambient pressure lowers the vapor pressure of water.

Answer 3

Decrease the atmospheric pressure.

Answer 4

You lower the Atmospheric pressure around the water.

Answer 5

The temperature at which water boils depends on the air pressure above it.

At normal atmospheric pressure, pure water boils at about 100 deg C.

If the air pressure is reduced, the water will boil at a lower temperature

As you increase your height above the Earth's surface, the air pressure decreases, and water will boil at a lower temperature.

At the top of Everest, water boils at about 70 deg. C

If you take cold water ,  and place it in a vacuum chamber, when you puimp most of the air out, the water will boil when its' cold. ( i.e. without heating it.)

(Conversely, if you increase the air pressure above the water, it will boil at a higher temperature ( e.g. in a pressure cooker at 120 deg C.))

Answer 6

Depending on other conditions, you could change the pressure.

Look at the phase diagram.

Answer 7

can't

Answer 8

For example by reducing the pressure. If you put it in a tank and you gradually pump out the air (thus reducing the pressure), it will sooner or later start to boil at room temperature.

Answer 9

lower the pressure sufficiently and water will boil below 100 degrees.

it is possible for ice water to begin boiling at the correct temperature and pressure.

Answer 10

everybody here is an idiot

how do we define tempreture?

it is the avreage kinetic energy of a body

give a body enough kinetic energy and its temperature increases...

water can be boiled by vigourously stirring it

though this will take AGES, but it has been done...somewhere around newton's time

Answer 11

Hmm, define 'boil'.  Doesn't that require temperature increase?

Or are you looking for bubbles only: a little CO2 perhaps?