A gas contains the 28 mol% methane, 27 mol% ethylene and the balance nitrogen, has an absolute pressure of 90 atm and temperature of 45. Using Kays rule and the generalized compressibility charts (see below), estimate the

a) specific volume in cm³/mol if the gas were ideal

b) pseudocritical pressure in atm

c) pseudocritical temperature in K

d) compressibility factor from the generalized compressibility charts

e) specific volume of the gas mixture in cm³/mol using this compressibility factor

f) density of the gas mixture in kg/m³

Critical constants for the pure gasses are as follows:

	Pc (atm)	Tc (K)
Methane	45.8	191
Ethylene	50.5	283
Nitrogen	33.5	126