Analyzing Liquid-Liquid Phase Diagram

University:
The Pennsylvania State University
Course:
CHEM 450 | Thermodynamics
Academic year:

2024
Views:

366

Pages:

1
Author:

Alexis H.

Problem Set #40 Assigned: April 8, 2024 Due: April 10, 2024 at 2:30 pm 1. Consider the liquid-liquid phase diagram shown below, which is for a mixture of A and B. (a) Use a star, *, to designate the upper critical point. On the x-axis and y-axis, denote the critical temperature and mole fraction. (b) A mixture shown by the red line is cooled down the isopleth from point 1 to point 2. What are the mole factions of A and B at point 1? i i j É a A x 0.25 0.75 (c) In the two-phase region at point 2, what is the mole fraction of A in the phase which is poor in A? What is the mole fraction of A in the phase that is rich in A? poor 0 15 rich 0.85 (d) In the two-phase region at point 2, in terms of a percentage, what fraction of the total number of moles are in the phase that is rich in A? 25 (e) Assume that the mixing of A and B follows Regular Solution Theory, i.e. mixH positive, negative, or zero? Explain your answer in 20 words or less mixS is ideal. Is the value of It would be zero because if the entropy of mixing is ideal then the enthalpy is as well.