Unformatted text preview: cost to cool your house for one month with your Stirling air conditioner if it’s 37 ° C outside and you still want to keep it 21 ° C inside? 3. A binary alloy is made by mixing atoms of two distinct substances A and B in equal parts. The total number of atoms in this allow is N . a) What is the entropy of this system if N = 10 23 ? (You may assume that ln( n !) ≈ n ln n ) b) The entropy that is created in making the alloy is called the mixing entropy . If no work was required to mix the alloy at 300K, evaluate the change in internal energy for the alloy. c) How would your results change if A and B were not distinct? 4. For the gas speed distribution of N particles, f ( v ) = Cv 2 for 0 < v < v max and f ( v ) = 0 for v > v max , find: a) C in terms of N and v max . b) The average (mean) speed of the particles. c) The rms speed of the particles....
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This note was uploaded on 02/04/2010 for the course PHYSICS 7B taught by Professor Packard during the Spring '08 term at Berkeley.
- Spring '08