Mechanical and Materials Engineering 2204A/B Lecture Notes - Lecture 12: Mecha
2 Jan 2019
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Document Summary
Disorder: a state of uncertainty about what exists. We know where all of the books are. Probability of finding given book on 1st try is 1. 0. Probability of finding given book on 1st try is 1/100. Disorder is only perceived in the mind of someone seeking to do something useful slots on shelf are also discrete and limits the # of states system can have. Electrons in orbit around nucleus of atom can only posses particular discrete energies. A gas in container can only exist in finite # of sates Lack of knowledge about state of system in analogous to our lack of knowledge of where books are located on the shelf. This uncertainty gives limitation in our ability to exploit energy of the system. The more ordered a system is, the more we can extract. Pure crystal at 0[k] can only exist in one state. As temperature rises (0. 5[k]), there is already a large # of possible sates.
