Experiment to show moisture in air
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In elementary school, there was an experiment to show that water has dissolved air, which involved boiling some water and observing the drops at the surface of the container, and this proved that water has air. Now, in senior high school, I was thinking about the same, and I think this conclusion is wrong. Aren't the drops formed by the conversion of liquid water to steam due to evaporation? Or is it really the dissolved air that is escaping? What are your thoughts?
There are two ways that I interpret the question you're asking, and I'll try to address each in turn.
If your teacher boiled a container of water and held a piece of glass above it to collect drops of liquid water, he or she may have been trying to show that water doesn't disappear when it boils, that instead it turns to a gas that can move through the air and can be condensed back into a liquid. Essentially, H2OHX2O is H2OHX2O, regardless of the state of matter it occupies.
If instead the teacher wanted you to observe the bubbles of gas forming in a container of hot or boiling liquid, he or she might have been on the right track, but either failed to convey the correct message to you or had the wrong idea in the first place.
If I take water from the tap and heat it strongly, bubbles will form on the inside of the vessel I'm heating it in prior to it boiling. These are bubbles of gas that are no longer soluble because the temperature of the liquid is too high (and its pressure has decreased as compared to the tap.) The gas is dissolved air (mostly carbon dioxide, I suspect) with a large portion of water vapor. In any case, they are bubbles of gas that were dissolved but are no longer. You can see this happen any time you boil a pot of water on the stove.
Once the pot reaches boiling, any bubbles are almost exclusively gaseous water formed via vaporization.
An easier, if slower, way to see this is to run a cold tap until the water is as cold as it will get, then pour a glass. As it sits (perhaps for an hour or two), bubbles will eventually form on the walls of the glass. These eventually will dissolve again and the gas will escape through the top of the glass, so it's not something you can set up at night and come back to the next morning. The bubbles are air that was able to dissolve in the high pressure/low temperature water in the pipes but not in the low pressure/high temperature water in the glass.
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In elementary school, there was an experiment to show that water has dissolved air, which involved boiling some water and observing the drops at the surface of the container, and this proved that water has air. Now, in senior high school, I was thinking about the same, and I think this conclusion is wrong. Aren't the drops formed by the conversion of liquid water to steam due to evaporation? Or is it really the dissolved air that is escaping? What are your thoughts?
There are two ways that I interpret the question you're asking, and I'll try to address each in turn.
If your teacher boiled a container of water and held a piece of glass above it to collect drops of liquid water, he or she may have been trying to show that water doesn't disappear when it boils, that instead it turns to a gas that can move through the air and can be condensed back into a liquid. Essentially, H2OHX2O is H2OHX2O, regardless of the state of matter it occupies.
If instead the teacher wanted you to observe the bubbles of gas forming in a container of hot or boiling liquid, he or she might have been on the right track, but either failed to convey the correct message to you or had the wrong idea in the first place.
If I take water from the tap and heat it strongly, bubbles will form on the inside of the vessel I'm heating it in prior to it boiling. These are bubbles of gas that are no longer soluble because the temperature of the liquid is too high (and its pressure has decreased as compared to the tap.) The gas is dissolved air (mostly carbon dioxide, I suspect) with a large portion of water vapor. In any case, they are bubbles of gas that were dissolved but are no longer. You can see this happen any time you boil a pot of water on the stove.
Once the pot reaches boiling, any bubbles are almost exclusively gaseous water formed via vaporization.
An easier, if slower, way to see this is to run a cold tap until the water is as cold as it will get, then pour a glass. As it sits (perhaps for an hour or two), bubbles will eventually form on the walls of the glass. These eventually will dissolve again and the gas will escape through the top of the glass, so it's not something you can set up at night and come back to the next morning. The bubbles are air that was able to dissolve in the high pressure/low temperature water in the pipes but not in the low pressure/high temperature water in the glass.
PLEASE GIVE BRAINLIEST ANSWER
PLEASE GIVE BRAINLIEST ANSWER
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If you put cold water can on table , after some time water droplets will appear outside of container, these water droplets show moisture in air became water by getting in contact of cold water can
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