Homework 2 Quest - a and b parameters have pretty clear cut...

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Homework 2 Thermo ll Fall 2010 Due:  Sept 16, 2010 in class. 1. Put the van der Walls EOS (6.2-38a) into Z form.  That is derive what  α β , and  γ  are for Eqn. 6.4-4,  which appear in Table 6.4-3. 2.  7.14 (a), (b) and (c) This will make sure that you know where some useful relationships come from.   Some starters to get the EOS-specific answers. (i) Start with Eqn 7.4-8 (ii) Use the  a b  forms of the EOS in Chapter 6, and definitions of the A’s and B’s can found on p.  297 and Table 6.4-3. 3. This will enable you to make some sense out of all the work above and get a better feel for what  fugacity means.   Fugacity is often called the effective or thermodynamic pressure of a component.  Playing with Eqn  7.4-13 (the  a, b  form) and the Van der Waals EOS might make fugacity more sensible because the 
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Unformatted text preview: a and b parameters have pretty clear cut physical meaning. What are the physical meanings of a and b ? Prove whether f is always <, =, or > P when the gas molecules have zero interactive forces between them (i.e. not sticky or repulsive), but they do have significant size. Does the answer make physical sense? That is, in the absence of interactive forces, does the difference between f and P increase, decrease, stay the same, etc as b increases, and does this trend make physical sense? Practical 4. Water vapor is in equilibrium with liquid water. The temperature is 350 o C. What are the numerical values of the fugacities of the liquid and vapor that can be determined when (a) The Law of Corresponding States is used? (b) Information from the Steam Tables is used?...
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