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Problem 3 (25 points) Consider the Txy and Pxy vapor liquid equilihri es for the binary system benzene (1) - Toluene (2): 1. What are the compositions at equilibrium of the liquid and vapor phases at? a. 80kPa and 90C ? b. 80kPa and 50C ? Answer: c. 100kPa and 100C ? Answer: d. 160kPa and 100C ? Answer: Answer: 2. What are the bubble and the dew pressures of a mixture containing 20% toluene at 100C ? Pbubble(kPa)=;Pdow(kPa)= 3. What are the bubble and the dew temperatures of a mixture containing 70% benzene at 80kPa ? Tbubble(C)=;Tdew(C)= 4. What is the phase of this binary mixture at the following conditions? 5. Assuming the validity of Raoult's law for this system, calculate the bubble and dew pressures at 10 for x1=0.80 and y1=0.80, respectively. Check your results graphically. Pbubble(kPa)=;Pdew(kPa)= 6. At 100kPa and 100C and if the overall mole fraction of benzene is 0.35, what molar fraction of t phase system is vapor? Answer: problem 4 (15 points) The production of hydrogen cyanide (HCN) by the following reaction reaches equilibrium at 650C and atmospheric pressure: N2(g)+C2H2(g)2HCN(g) as functions of the reaction coordinate (). 2. Calculate the equilibrium constant (K) of this reaction at 650C. Hint: K=K0K1K0=exp(RT0G0)U=exp[RTTnH0(1TT0)]