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The Redlich-Kwong equation of state is given by
where R = the universal gas constant [= 0.518 kJ/(kg K)], T = absolute temperature (K), p = absolute pressure (kPa), and v = the volume of a kg of gas (m3/kg). The parameters a and b are calculated by
where pc = critical pressure (kPa) and Tc = critical temperature (K). As a chemical engineer, you are asked to determine the amount of methane fuel (pc = 4600 kPa and Tc = 191 K) that can be held in a 3-m3 tank at a temperature of -40°C with a pressure of 65,000 kPa. Use a root-locating method of your choice to calculate y and then determine the mass of methane contained in the tank. |
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