1. A 3.7-μL sample of xenon has a pressure of 2.30 torr at 16°C. a) Calculate the amount of Xe present in moles. b) How many Xe atoms are present? 2. A gas cylinder of 52.8 L volume contains N2(g) at a pressure of 27.1 atm and 27°C. Compute the number of grams of Ne(g) that must be added to this same cylinder to raise the total pressure to 73.0 atm?
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.
1. 1. A 3.7-μL sample of xenon has a pressure of 2.30 torr at 16°C.
a) Calculate the amount of Xe present in moles.
b) How many Xe atoms are present?
2. A gas cylinder of 52.8 L volume contains N2(g) at a pressure of 27.1 atm and 27°C. Compute the
number of grams of Ne(g) that must be added to this same cylinder to raise the total pressure to 73.0
atm?
3. A certain amount of N2 gas originally held at 4.50 atm pressure in a 2.00-L container at 27°C is
transferred to a 15.0 L stainless steel tank at 20°C. A quantity of O2 gas originally at 5.15 atm and 26°C in
a 4.00-L container is transferred to this same tank. What is the total pressure in the tank?
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