Estimation of Diffusivity of a Binary Gas. For a mixture of ethanol (CH3CH₂OH) vapor and methane (CH4), predict the diffusivity using the method of Fuller et al. (a) At 1.0132 x 105 Pa and 298 and 373 K. (b) At 2.0265 x 105 Pa and 298 K.

2. Consider the P-x-y diagram at 300 K for A-B mixtures at right. (a) What are the vapor pressures of A and B at 300 K? (b) A 25 mol-% A vapor mixture is isother- mally compressed from 1.5 to 2.0 bar. Does a 2-phase mixture form, and if so, what is the mole fraction of A in each resulting phase? (c) Using data at the azeotrope, compute the van Laar parameters a and 3 for A-B mix- tures at this temperature. P (bar) 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 XA or YA

Complete the property table for water below. Use only the Thermodynamic Property Table for Water referring to the Smith, Van Ness and Abbot Thermodynamics textbook. P [kPa] V [m³/kg] H[ kJ/kg] T[°C] Phase Description X 500 Saturated liquid 171 2044.5 300 0.8 Note that x refers to the "quality" or the mass fraction of the water in vapor phase. If the system is composed of pure liquid water, x = 0. If the system is composed of pure gaseous steam, x = 1. The volume of a liquid/vapor system can be determined using the following equation. V = Vj + x(Vg-Vj) V - volume of saturated liquid water Va - volume of saturated gaseous steam Similar calculation can be done for other properties such as internal energy, entropy, and enthalpy. H = HỊ + x(Hg-H) Under phase description, indicate whether the system is composed of saturated liquid, saturated vapor, superheated vapor, or liquid-vapor mixture. Also note that when pressure is given, it is more advisable to use the Superheated Steam Table than…

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