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Why will water in a flask begin to boil at room temperature as air is pumped out of the flask?
Wiki User
∙ 15y ago
The boiling point of a liquid is the temperature at which the vapour pressure of the liquid is equal to the environmental pressure surrounding the liquid.
Since there is no environmental pressure on the liquid in vacuum, its boiling point is directly above its freezing point. In other words, as soon as the liquid unfreezes from the solid state, it turns to steam because there is no outside pressure to hold the molecules in liquid state.
Wiki User
∙ 11y ago
Wiki User
∙ 15y agoBecase it have not atmosferical presion over. This the same fenomen that go to ebullition at aprox. 75ªC in the Everest summit.
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Will a thermos keep cold or hot water at it's temperature range longer?
The rate of heat flow across a boundary such as the vacuum between the inside of the thermos flask and the ambient atmosphere is proportional to the temperature difference. So if you have hot water inside at say 90 C and an ambient of 30 C that is a difference of 60 C, whilst if you have cold water inside at 10 C the difference is 20 C. The heat flow will therefore be three times as much for the hot water as for the cold water, so the rate of change of temperature will be three times greater.
What is the lowering of the water table that occurs when water is pumped from a well?
the cone of depression
Why doesnt water have to be pumped out of an artesian well?
Pressure from underground pushes water up to the surface.
What temperature is the water?
Water temperature tells you how cold or hot the water is. If the water is hot, the heat indicates the kinetic energy of the water.
Is often groundwater must be be pumped to the surface To be used?
Groundwater does not have to be pumped to the surface to use, although that would seem the most logical way to get access to it. It has no difference on the make up of the water, or the purity.
What temp does breast milk has to be?
Room temperature is ideal for breastmilk. Do not microwave pumped breastmilk. To thaw frozen breastmilk or warm up refrigerated breastmilk, place the pumped bag inside a cup of warm water or under running warm water.
What does water begin to do when its temperature reaches the dew point?
condense
Water temperature of lake Las Vegas?
There's no automated direct measurement. However, water is pumped there from Lake Mead so you'll probably be within a few degrees of the Lake Mead temperature.
When will the caterpillar c7 engine begin to overheat and the Max Temperature of operation?
A Caterpillar see seven diesel engine will begin to overheat at a water temperature of 210 degrees. The recommended operating water temperature is 180 degrees.
Why is it acceptable to add water to the titration flask?
Once you have measured out your sample and transferred it to your flask, the absolute amount (moles) of sample is fixed. Adding water to the flask will change the concentration in the flask, titrating also adds volume to the flask as well as reacting with the sample. However, the number of molecules of sample you put into the flask will not change by simply diluting it with water.
Examples of air exerts down ward pressure?
1. Put a little water (about 20 ml) in the flask and heat it to a boil. 2. Let the water boil vigorously for at least one full minute. 3. Take the flask off the hot plate and immediately place the balloon with the mouth over the flask's mouth. 4. Let cool slowly at room temperature (the balloon will be pushed inside out into the flask).
Why did the water rush into the erlenmeyer flask when it was submerged in the cold water?
1. When the flask was placed into the cold water, the colder air molecules in the flask move slower, putting out less pressure. With the decrease in air pressure inside the flask, the now greater pressure outside pushes water into the flask until the pressure inside equals the pressure outside.
What do you call the object that keeps water hot for hours?
Thermos flask or vacuum flask.
Which warm up faster copper or water?
it depends on what is the temperature of the water to begin with and if they were at the same degrees, it would be water.
Must a flask be a good conductor of heat?
so as to keep the flask hot hereby keeping the hot water inside the flask hot.
What change in the water level occurs when you hold Erlenmeyer flask over a candle in a pan of water?
When you put a flask over the candle in a pan of water, the water in the pan starts to slowly rise inside the flask, and as the water slowly starts to rise, the candle slowly burns out.
When do the ice turns into water and when do water turns into ice?
The state of the water depends on the temperature of the water and the surroundings. If the water is below freezing point, the water will begin to freeze, and thaw when the temperature rises above the freezing point.
