1. Complete the following paragraph by placing the appropriate words in the blanks on the right. When particles container, it results in gas 1 with the wall of their 2 The pressure 3 and volume of a fixed mass of gas are related, therefore, if one decreases, the other 4. This relationship is known as The greater the temperature of a gas, the pressure it will exert on its container. This 5 law. 6 relationship was identified by _____7. As a gas is heated, its volume will 8 as defined by 9 law. is law. If a gas The three separate laws above can be written as a single expression called the 10 not at STP, we can use the ideal gas law, which is where Ris 12 and "n" represents the of a gas. 11 13 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Period:
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) When gaseous particles strike with the wall of their container, it results in gas pressure.
(2) The pressure and volume of a fixed mass of gas are inversely related, therefore if one decreases , the other increases . This relationship is known as Boyle's law.
(3) The greater the temperature of a gas , more pressure it will exert on its container. This relationship was identified by Gay-Lussac's law.
(4) As a gas is heated , it's volume will increase as defined by Charle's law.
(5) The three separate laws above can be written as a single expression called the Ideal Gas law. If a gas is not at STP, we can use ideal gas law, which is PV = nRT , where R is Universal Gas constant and n represents the number of mole of a gas.
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