Natural gas consists of 60.0 mole% ethane and 40.0 mole% butane.The gas is stored in a 300 ft^3 tank at a pressure of 1500 psig,and a temperature of 220 F and sold at a cost of $0.15/lb.
a) Determine whether the ideal gas equation of state is a goodapproximation for the given conditions.
b) Estimate the cost to fill the tank using thecompressibility-factor equation of state.
