A vapor at x1 = 80 mol% is cooled at constant pressure to a temperature T = (Tdew + Tbubl)/2. What fraction of the vapor condenses at this temperature?

) 1. A process stream contains pure ethanol at 70 °C and 50 kPa. Is the stream liquid or vapor? Show all calculations and explain your reasoning.

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If ice homogeneously nucleates at -57.8°C, calculate the critical radius given values of -3.1 x 108 J/m³ and 25 x 10-3 J/m2, respectively, for the latent heat of fusion and the surface free energy 0.9854 x 10-10 m O 0.1284 x 10-5 m O 0.5981 x 10-11 m O 0.7618 x 10-9 m

2. At a temperature of 400°C, the specific enthalpy of a water sample is 3100 KJ/kg. What is the phase of the water? a. Solid b. Solid-liquid mixture c. Subcooled liquid d. Saturated liquid e. Saturated mixture f. Saturated vapor g. Superheated vapor For the water in problem 2, determine the following: a. If saturated mixture calculate the quality, x = b. Determine the pressure

This table displays the vapor pressure of nitrogen at several different temperatures. Use the data to determine the heat of vaporization and normal boiling point of nitrogen.Temperature (K)                        Pressure (torr)65                                              130.570                                              289.575                                              570.880                                              102885                                              1718

For substance A, it is known that the vapor pressure at 300K is 100kPa. It is also known that the boiling point temperature is 340K at 150 kPa. Other given information about substance A: Cpl= 200 J/mol.K and Cpv = 180 J/mol.K c) Using the correlation developed in part a), determine the latent heat of vaporization of substance A in kJ/kmol d) 2 mol of substance A goes through a process where its temperature changes from 400K to 300K at constant pressure 150kPa. i) What phase is present initially? ii) What phase is present at the final state? iii) Determine the total amount of energy transferred (in kJ) through the process and state whether the energy is transferred to or from the substance.