You take a sample of water that is at room temperature andin contact with air and put it under a vacuum. Right away,you see bubbles leave the water, but after a little while, thebubbles stop. As you keep applying the vacuum, more bubblesappear. A friend tells you that the first bubbles werewater vapor, and the low pressure had reduced the boilingpoint of water, causing the water to boil. Another friendtells you that the first bubbles were gas molecules from theair (oxygen, nitrogen, and so forth) that were dissolvedin the water. Which friend is mostly likely to be correct?What, then, is responsible for the second batch of bubbles?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
You take a sample of water that is at room temperature and
in contact with air and put it under a vacuum. Right away,
you see bubbles leave the water, but after a little while, the
bubbles stop. As you keep applying the vacuum, more bubbles
appear. A friend tells you that the first bubbles were
water vapor, and the low pressure had reduced the boiling
point of water, causing the water to boil. Another friend
tells you that the first bubbles were gas molecules from the
air (oxygen, nitrogen, and so forth) that were dissolved
in the water. Which friend is mostly likely to be correct?
What, then, is responsible for the second batch of bubbles?
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