Why does water under a vacuum boil at room temperature? Dominic - Yes, we do tend to think of water existing as a solid below zero degrees, as a liquid up to 100 degrees and then boil into steam. But, in fact, those are three different states that water can take at any temperature. It's just that, energetically, it prefers to be in particular states at different temperatures.
https://www.thenakedscientists.com/articles/questions/why-does-water-under-vacuum-boil-room-temperature
If water boils in a vacuum, what would the absolute/relative humidity be in the space above the boiling water? Answer Wiki. In order to answer this, we first have to examine the definition of relative humidity. In air the relative humidity is the percentage of humidity in air at a given temperature. For example if at a temperature of 40, the saturation of humidity in the air is 100, then if you have 33, you would say the relative humidity is 33%.
https://www.quora.com/If-water-boils-in-a-vacuum-what-would-the-absolute-relative-humidity-be-in-the-space-above-the-boiling-water
We didn't say that temperature must go up in a vacuum. We just said that an ordinary vacuum can have a temperature due to the electromagnetic waves in it. That temperature will become the same as the temperature of the material surrounding the vacuum.
https://van.physics.illinois.edu/qa/listing.php?id=1046
The experiment of tranferring a blob of water from room conditions of temperature and pressure to space vacuum. – babou Feb 12 '14 at 12:19. @babou The OP mentioned the observation in his answer So, water in vacuum will boil first and then freeze.
https://physics.stackexchange.com/questions/98666/water-in-vacuum-or-space-and-temperature-in-space
vacuum is measured in inches of mercury. sea level is zero. water will boil at 212F. as negative pressure or elevation increases the boiling temp. of water decreases. if you had a pressure reading of 29.7 in of mercury the water will boil at 192F. if you had a pressure reading of 10 in of mercury water will boil at 32F. Claudia Rojas.
http://www.answers.com/Q/Water_boils_at_what_temperature_in_a_vacuum
For example for an ideal monatomic gas, the average thermal energy per particle is (3/2)kT, where k is Boltzmann's constant. However, in general that definition breaks down in serious ways. In a vacuum, if you choose to call photons particles, the very number of the particles depends on temperature, going as T3. (The average energy per photon does still go as T.) Since the number of photons only goes to 0 when T -> 0, if there are no particles of any type then T=0.
https://van.physics.illinois.edu/qa/listing.php?id=1046
Water Boiling Temperature vs Pressure in Vacuum Table Chart. The boiling point of water is the temperature at which the vapor pressure of the liquid water equals the pressure surrounding the water and the water changes into a vapor. Water at high pressure has a higher boiling point than when that water is at atmospheric pressure.
http://www.engineersedge.com/h2o_boil_pressure.htm
Water in vacuum (or space) and temperature in space. up vote 5 down vote favorite. 3. So, water in vacuum will boil first and then freeze. I don't know how the freeze happens.
https://physics.stackexchange.com/questions/98666/water-in-vacuum-or-space-and-temperature-in-space
Confidence votes 42.5K. In a vacuum, water has no liquid phase. At any temperature high enough to melt ice, the water will then boil. 3 people found this useful.
http://www.answers.com/Q/What_is_boiling_point_of_water_at_absolute_vacuum
Other than the lack of a breathable atmosphere, the second most dangerous thing to humans exposed to the vacuum of space is lack of pressure. In a vacuum, there is no pressure. This is critical for most liquids to remain in a liquid state because with no pressure, the temperature at which they start to boil drops. Water boils when there is no pressure (and as morbid as it sounds, so does blood). This means that in the vacuum of space, a cup of water would boil into a vapor before it can freeze. It would eventually freeze, but it would – desublimate – or vaporize into a gas first, then turn directly into a solid.
http://zidbits.com/2011/05/why-does-water-boil-in-the-vacuum-of-space/
what temperature does water boil in an absolute vacuum
Water boils at a temperature of 100 in an absolute vacuum.