A reservoir gas is made up of the following compounds 25 lb of methane, molecula

Question

A reservoir gas is made up of the following compounds 25 lb of methane, molecular weight 16.04 T_c = 344 R degree P_c = 667 degree psi 3 lb of ethane, molecular weight of 30.07 T_c = 550 R degree Pc = 708.00 Psi 1.5 lb of propane, molecular weight 44.09 T_c = 6660 R degree Pc = 616.00 Psi a = Express the composition of the gas in weight and mole fraction b = Calculate the apparent molecular weight of the gas c = determine the gas gravity of the gas d = Calculate pseudo-critical temp and pseudo-critical pressure of the mixture gas

Explanation / Answer

1. Composition of components of gas in mole fraction

nCH4

= 25.0 lb / 16.04 lb * (lb mol of CH4) = 1.558 lb mol of CH4

nC2H5

=3.0 lb / 30.07 lb * (lb mol of CH4) = 0.099 lb mol of CH4

nC3H8

=1.5lb / 44.09 lb * (lb mol of CH4) = 0.034 lb mol of CH4

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