ps6 - Chem120B Problem Set 6 Due: March 11, 2011 1....

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Chem120B Problem Set 6 Due: March 11, 2011 1. Problems 21-10, 21-11, and 21-12, 22-1, and 22-2 in Simon and McQuarrie’s Physical Chemistry . 2. Salt water is plentiful on earth; natural supplies of fresh water, on the other hand, are dwindling while mankind’s demands grow. One appealing solution to this imbalance is to remove the salt from ocean water by some means. Here you will investigate the energy input that is necessary to accomplish this task. Special membranes can be manufactured that allow water, but not ions, to pass through. By pushing such a membrane through salt solution, one can separate salt and water, as depicted below: (i) Explain, in terms of multiplicity of microscopic states, why work is required for this process to be carried out at fixed temperature and total volume of the solution. (ii) Imagine that the solutes, whose initial concentration is c 0 , do not interact with one another, so that the energy of the system does not change throughout the process. What is the minimum amount of work required to purify a fraction
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This note was uploaded on 09/12/2011 for the course CHEM 107B taught by Professor Jamesames during the Spring '09 term at UC Davis.

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ps6 - Chem120B Problem Set 6 Due: March 11, 2011 1....

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