Humans and other mammals breathe in oxygen from the air for respiration. At the top of Mt Everest, there is decreased atmospheric pressure and decreased temperature. How will the decreased pressure and temperature affect the air that a mountain climber is breathing? A) Decreased pressure decreases the amount of air molecules per breath whereas the decreased temperature increases the speed of the air molecules per breath, so this has no impact on mountain climbers. B) Decreased temperature and high altitude result in decreased air pressure. This results in a decreased number of air molecules per breath, which means mountain climbers often must carry oxygen tanks. C) Decreased pressure increases the number of air molecules per breath and the decreased temperature also increases the number of air molecules per breath, which means mountain climbers often must carry oxygen tanks.
Ideal and Real Gases
Ideal gases obey conditions of the general gas laws under all states of pressure and temperature. Ideal gases are also named perfect gases. The attributes of ideal gases are as follows,
Gas Laws
Gas laws describe the ways in which volume, temperature, pressure, and other conditions correlate when matter is in a gaseous state. The very first observations about the physical properties of gases was made by Robert Boyle in 1662. Later discoveries were made by Charles, Gay-Lussac, Avogadro, and others. Eventually, these observations were combined to produce the ideal gas law.
Gaseous State
It is well known that matter exists in different forms in our surroundings. There are five known states of matter, such as solids, gases, liquids, plasma and Bose-Einstein condensate. The last two are known newly in the recent days. Thus, the detailed forms of matter studied are solids, gases and liquids. The best example of a substance that is present in different states is water. It is solid ice, gaseous vapor or steam and liquid water depending on the temperature and pressure conditions. This is due to the difference in the intermolecular forces and distances. The occurrence of three different phases is due to the difference in the two major forces, the force which tends to tightly hold molecules i.e., forces of attraction and the disruptive forces obtained from the thermal energy of molecules.
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