Partial pressures The scene below depicts a mixture of four gases. (1) Which gas has the highest partial pressure? (2) Which gas has the lowest partial pressure? (3) If the total pressure is 1.75 atm, the partial pressure of the orange gas is atm. (Report as a number to two decimal places.) (4) When the total pressure of a mixture of gases is lowered, the partial pressures of individual gases are also reduced. Suppose you are in an airplane, flying at an altitude of 18,000 ft. where the external air pressure is 0.49 atm, and the cabin suddenly depressurized. If oxygen gas constitutes 21 mol% of the atmosphere, what is the partial pressure of oxygen that you encounter? atm. Do you think you will survive if your body requires at least 0.15 atm O2 for your blood to be sufficiently oxygenated?
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.
Question 4: the partial pressure of oxygen?
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