Show how the parameters in the two equations are related.
Liquid/vapor saturation pressure is often represented as a function of temperature by the Antoine equation,
which can be written in the form:
Here, parameters a, b, and c are substance-specific constants. Suppose this equation is to be rewritten in the equivalent form:
The point of this problem is just for you to practice evaluating and plotting a simple function. You will do a number of problems over the course of the semester (and many more over the course of your career) in which the results are best presented in graphical form. The only thing to be careful of in plotting the Antoine equation is to pay attention to the units of T and and to whether the constants are given for use with the base 10 logarithm or the natural logarithm. The parameters in Table B.2 are for use with T in °C, P in kPa, and the natural logarithm. I used MS Excel to prepare the plots for diethyl ether. A portion of the spreadsheet (containing the plots) is shown below:
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