(a) When you exercise vigorously, you sweat. How does thishelp your body cool? (b) A flask of water is connected to avacuum pump. A few moments after the pump is turnedon, the water begins to boil. After a few minutes, the waterbegins to freeze. Explain why these processes occur.
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.
(a) When you exercise vigorously, you sweat. How does this
help your body cool? (b) A flask of water is connected to a
vacuum pump. A few moments after the pump is turned
on, the water begins to boil. After a few minutes, the water
begins to freeze. Explain why these processes occur.
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