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Show transcribed image text Problem 4 (20 points) Consider a 1 m tank containing 2,2-dimethylpropane in vapor-liquid equilibrium at 30 °C. After use of the 2,2-dimethylpropane and storage of the tank at 0 C, the amount of liquid 2.2-dimethylpropane in the tank drops to 10% by volume. a) Estimate the pressure (bar) and molar quality (vapor fraction) in the tank at 0 C assuming vapor- liquid equilibrium is maintained. Compare the estimated pressure to that given by the NIST WebBook. Use the following data: Heat of vaporization at 30 °C = 22.7 kJ/mol Vapor pressure at 30 °C = 2.0 bar Molar volume of liquid at 30 °C = 1.2465×10-4 m3/mol The saturated vapor for 2,2-dimethylpropane obeys the equation of state: RT 2-dimethylpropane obeys the equation of where b(n-but biT, bo-2.96×10-3 m3/mol, and bi-6.81×10"mHmol.K). b) Calculate the fugacity of liquid 2,2-dimethylpropane at 0 °c. c) What is the fugacity of liquid 2,2-dimethylpropane at 20 bar and o c?