IM_quetions_with_answers

IM_quetions_with_answers - Explain the statement you need...

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Explain the statement “you need attractive forces to condense and repulsive forces to freeze”. o As mentioned above, the attractive forces actually cause the molecules in a gas to collapse to a much denser solid or liquid state. The difference between a solid and a liquid, on the other hand, is that the molecules in a solid are fixed in space whereas those in a liquid can move around. It is the short range repulsions that hold the molecules in place in the solid state, because these are the interactions that represents what happens when two particles come in contact. (To hold something in place, even in common speech, means to put it in contact with enough other objects such that it no longer has any place to move.) What are dispersion or London forces? Describe how they arise. o Atoms and molecules are tiny highly charged positive centers surrounding by a “cloud” of negative electrons. As the electrons move around the cloud changes shape and “instantaneous” dipoles are created. These dipoles will then induce
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This note was uploaded on 10/26/2011 for the course CHEM 20L taught by Professor Gould during the Spring '08 term at UCLA.

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IM_quetions_with_answers - Explain the statement you need...

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