Develop plots for vapor pressure of water and n-decane. For water, two plots are useful in the range of values in Table 8-1. A plot of VP versus T is convenient for rapid estimates but is not as accurate as a plot of log (VP) versus \(1 / \mathrm{T}\) with \(\mathrm{T}\) in degrees Kelvin. Of course, a plot for n-decane would also be useful but will not be used as often as the water data.

a. Plot water vapor pressure versus \(\mathrm{T}\) on a normal sheet of graph paper.

b. Expand Table 8-1 to include columns for \(\mathrm{T}\) in degrees Kelvin, 1/T \((1 / \mathrm{K})\), and \(\log (\mathrm{VP})\). Then plot \(\log (\mathrm{VP})\) versus \(1 / \mathrm{T}\).

c. Plot n-decane vapor pressure versus \(\mathrm{T}\) on a normal sheet of graph paper. Data are in Table 8-2.

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TABLE 8-1 Vapor pressure water (T in C and VP in mm Hg) T 95.5 96.0 96.5 97.0 97.5 98.0 98.5 99.0 99.5 VP 645.67 657.62 669.75 682.07 694.57 707.27 720.15 733.24 746.52