A natural dry gas has the following composition:

Component

Mole Fraction

$($Yi$)$

N$20\mathrm{.}0236$

CO$20\mathrm{.}0200$

H$2$S $0\mathrm{.}1841$

CH$40\mathrm{.}8000$

C$2$H$60\mathrm{.}0180$

C$3$H$80\mathrm{.}0005$

i$-$C$4$H$100\mathrm{.}0003$

n$-$C$4$H$100\mathrm{.}0003$

i$-$C$5$H$120\mathrm{.}0001$

n$-$C$5$H$120\mathrm{.}0001$

C$6$H$140\mathrm{.}0001$

C$7+0\mathrm{.}0009$

SUM $1\mathrm{.}0480$

C$7$

$+$ molecular weight $=125$ lbm$/$lbm$-$mol,

C$7$

$+$ gravity $=0\mathrm{.}77$

Calculate: $($Create excel spread sheet$)$

a$.$ Average molecular weight, Ma$,$ of the gas mixture.

b$.$ Specific gravity, g $,$ of the gas mixture.

c$.$ The pseudocritical pressure, Ppc$,$ and the pseudocritical temperature, Tpc$,$ using MaCain$$s

mixing rules.

d$.$ Corrected pseudocritical pressure, Ppc$,$ and the pseudocritical temperature, Tpc$.$

e$.$ Use the results of part d to build a table of the following gas properties $($z factor, gas

density, $\backslash$rho g$,$ gas formation volume factor, Bg$,$ gas compressibility, Cg$,$ and gas viscosity,

$\backslash$mu g$)$ at a temperature of $250$ oF and pressure of $500,1000,1500,2000,2500,$ and $3000$

psia.