If the one-constant Margules equation is valid for a binary mixture, what value of GE is required for phase separation to occur?

Please explain it well, thank you so much.

Explain why Raoult's Law has very limited applicability in its ability to accurately predict vapor-liquid equilibrium behavior. Be very specific in your answer.

True or false: For a mixture forming VLE, the fugacities of all chemical species must be identical

3. Fig. 3-1 shows z as function of mole fraction of butane in a nitrogen/butane mixture. The figure shows line for various pressures. Explain why z for pure butane behaves so differently from z for pure nitrogen as P increases, in particular, why is the butane z non-monotonic in pressure.

Describe the significance of the Gibbs theorem for ideal gases.

Compute the fugacity and chemical potential for CO2 at 323 K and 5 bar. At these conditions, CO2 is described by the virial equation of state truncated at the second virial coefficient. Assume that the interaction potential between CO2 molecules can be described by the spherically symmetric square-well potential.

6. By indicating the partial positive and partial negative atoms, show the bond polarity for each of the following molecules: 
(a) O–F (b) Br–Br (c) C–Br (d) C–O

Exercise 3: Crystalline domain size The Full Width at Half Maximum (FWHM), for a Bragg reflection occurring at 20 = 74.187 0, is 3.306 °. Estimate the crystalline domain size assuming: K = 0.9; B₁ = 0.050; and λ = 1.5418 Å.

23. Assume that argon at 273.15 K is represented by the square-well potential with ɛ/k = 141.06 K, o = 0.2989 nm, and R = 1.55. Estimate the second virial coefficient for argon at 273.15 K and compare with the experimental value B = -22.08 cm³ mol-!. %3D