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jlaugh87
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If you suspend an open-topped container of water in a pot of boiling water, water in the inner container will reach 100 degrees C but will not boil. Why is this?
You were not pulling air out of the water. You were reducing the pressure over the water so that it would go to its vapor phase (boil) at less than boiling temperature. Boiling temperature is a function of both temperature and pressure. Large boilers are often highly pressurized so that the water will store LOTS of heat energy and not boil until the water is very hot. If you boil water on top of a mountain, it will boil at a lower temperature than 212 deg F and the offset is proportional to the ambient pressure.noagname said:this is kind of on the other side of this question
I was doing this in my 8th grade science class room
but we did not get a chance to finish it.
we put a cup of water into an airtight container
and slowly started to suck out all of the air and after like 5 mins the water started to look like it was boiling
with out the heat
now i can under stand the air being pulled out of the water but i am wondering after some time what would happen to the water
Try this.noagname said:that is pretty hard to understand but ok
noagname said:that is pretty hard to understand but ok
The boiling point of pure water at sea level is 100 degrees Celsius or 212 degrees Fahrenheit.
Water has a temperature limit when boiling because at the boiling point, the molecules in the liquid have enough energy to overcome the intermolecular forces and escape into the gas phase. Any further increase in temperature would require additional energy to break these bonds, resulting in a plateau of the temperature.
Yes, the boiling point of water changes at different altitudes due to the change in atmospheric pressure. Higher altitudes have lower atmospheric pressure, which means the boiling point of water decreases. For example, at the top of Mount Everest, where the atmospheric pressure is much lower, water boils at around 68 degrees Celsius.
Yes, other factors such as the purity of the water, the presence of impurities, and the container material can affect the boiling point of water. For example, saltwater has a higher boiling point than pure water, and a metal pot may have a higher boiling point than a plastic container.
The boiling point of a liquid is directly related to the pressure exerted on it. Higher pressure increases the boiling point, while lower pressure decreases it. This is why water boils at a lower temperature in higher altitudes where the atmospheric pressure is lower.