20-22 Kinetic Molecular Theory A. Gases are comprised of very small particles wh
ID: 693289 • Letter: 2
Question
20-22 Kinetic Molecular Theory A. Gases are comprised of very small particles whose diameters are very small B. These particles are moving at very high speeds. O2 molecules move about To explain the behavior of gases, the following theory for the "ideal" gas has been proposed compared with the distances between particles (Gas volumes are mostiy empty space). 1000 miles/hr @ 25°C, and H2 molecules move about 4 times that rate. C.Particles collide with themselves and the walls of the container in perfectly elastic collisions with no change to the total energy of motion of the particles (energy can be transferred from one particle to another but the total energy of the system remains constant). Gas pressure is caused by the gas particles hitting the sides of the container. Both the frequency and the force of these collisions affect gas pressure D. There are no attractive forces between gasparticles. 20. Explain to your teammates Boyle's Law in terms of KM theory: why is the pressure of a gas inversely proportional to its volume? Explain, using KM Theory, the relationship between the temperature of a gas and the pressure of the gas. How about temperature and volume? 21. 22. How does KM theory account for Avogadro's Law: the volume of a gas is roportional to the number of moles of the gas? Why doesn't one mole of an element like xenon occupy more space than one mole of helium atoms, which is a much smaller atom?
Explanation / Answer
Ans 20 :
According to Boyle's law , the pressure of the gas is inversely proportional to its volume.
This can be expalined with the help of experiment , where a fixed amount of gas is enclosed in a sealed container with the flask with piston. As the piston is forced in, the pressure of the gas inside the chamber increases and the volume decreases. Opposite happens when the pressure is decreased.
When the pressure is applied to the gas , the molecules come closer to each other and occupy lesser volume , but when in the absence of pressure , they expand and molecules move farther and occupy larger volume.
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