Determine whether the van der Waals equation of state admits a critical point if we do not include the attractive part of the expression

The second virial coefficient is related to pair-wise potential function via B(T) = 2πNA (1- e-/kr) r²dr. Use the hard sphere pairwise potential function to find B(T).

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.

this is a physical chemistry question thank you 1

E Open with Google Docs OCESSES OF PURE SUBSTANCES.pdf EXAMPLES A closed rigid vessel having a volume of 100 m3 contains 10 m3 of saturated liquid water and 90 m3 of saturated water vapor at 1.0 MPaa. Heat is transferred until the vessel filled with saturated vapor. Determine the heat transfer.

This problem is (12.24) from a book  "Thermodynamics and Statistical Mechanics An Integrated Approach by M. Scott Shell"