hw4_F - CH353M Homework assignment 4 (due Friday Oct. 28)...

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CH353M Homework assignment 4 ( due Friday Oct. 28 ) 1(5) . The equation of state of a material is given by 2 0 V Va Pb T =− + , where V 0 , a , and b are constants. Derive the equation for the change of the chemical potential of this material, 0 (,) ( ,) PT P T µµ , when its pressure is raised from P 0 to P . 2(10) . Obtaining very high vacuum inside an aluminum container is ultimately limited by the fact that some of the atoms of Al escape the bulk of the metal and form the vapor phase. Calculate the pressure of aluminum vapor that is in equilibrium with Al(s) at T=298K using the value (Al(g)) f G =285.7 kJ/mol for Al(g) at P=1atm and T=298K. To simplify your calculations, neglect the pressure dependence of the chemical potential of Al(s) . 3A(10) . Estimate the difference in the boiling temperature of water between Austin, TX (elevation 163 m above sea level) and Longs Peak, CO (4,345 m). The molar heat of vaporization for water is 40.66 kJ/mol vap H ∆= . Assume that temperature of the atmosphere does not depend on the elevation and is equal to 25 ° C.
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hw4_F - CH353M Homework assignment 4 (due Friday Oct. 28)...

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