Week 6 Practice Problems

Week 6 Practice Problems - CHEMISTRY 201X Practice Problems...

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CHEMISTRY 201X September 24-28, 2007 Practice Problems (50) At its melting point (624 ° C), the density of solid plutonium is 16.24 g/cm 3 . The density of liquid plutonium is 16.66 g/cm 3 . A small sample of liquid plutonium at 625 ° C is strongly compressed. Predict what phase changes, if any, will occur. (51) The following table gives several important points on the pressure-temperature diagram of ammonia: p (atm) T (K) Triple Point 0.05997 195.42 Critical Point 111.5 405.38 Normal Boiling Point 1.0 239.8 Normal Melting Point 1.0 195.45 (a) Use this information to sketch the phase diagram of ammonia. (b) The van der Waals constants for ammonia are 4.170 L 2 atm/mol 2 and 0.03707 L/mol. Estimate the critical temperature and critical pressure for ammonia and compare your results with the data in the table. (c) Estimate the critical density (g/cm 3 ) of ammonia. (d) Estimate the heat of vaporization of ammonia from these data. (52)
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This homework help was uploaded on 03/27/2008 for the course CHEM 201 taught by Professor Miller during the Fall '07 term at Iowa State.

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Week 6 Practice Problems - CHEMISTRY 201X Practice Problems...

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