$($adopted from BS$,7$th edition$)$ Saturated pressure as a function of temperature follows a

correlation obtained by Wagner to find

$ln{P}_r=\frac{w_1+w_2{}^{1\mathrm{.}5}+w_3{}^3+w_4{}^6}{T_r},$

where the reduced pressure and temperature are $P_r=\frac{P}{P_c}$ and $T_r=\frac{T}{T_c},$ where $c$ denotes

the critical point. The term $$ is defined as

$=1-T_r.$

The parameters for R$134-$a are

$w_1=-7\mathrm{.}59884,w_2=1\mathrm{.}48886,w_3=-3\mathrm{.}79873,w_4=1\mathrm{.}81379.$

Compare this correlation to the results found in the table in Appendix B$.$

Make your comparison in the form of a plot of $P$ versus $T.$ Use appropriate SI units for pressure

and temperature, and label your plot appropriately. Your plot should have a continuous curve

for the predictions of Wagner's equation; do not use circles or stars, etc., to label any individual

points. The data from the tables should be labeled by a discrete marker such as a little circle

or star. The data from the table should not have any curve connecting its points on your

graph; just put in the raw data points. Examine plots on linear and semi$-$log$,$ and log scales,

and choose to present the one that gives the best depiction of the information.