5. Two white crystalline forms of phosporus. Both forms contain P4 moleculesbut the molecules are packed together in different ways. The α forms isalways obtained when the liquid freeze. However, below −76.9◦C, the α forms spontaneously convert into β form:P4(s,α) → P4(s,β)(a) Predict the signs of ∆H and ∆S for this process.(b) Predict which form of phosphorus has the more ordered crystallinestructure (has the smaller positional probability).
5. Two white crystalline forms of phosporus. Both forms contain P4 moleculesbut the molecules are packed together in different ways. The α forms isalways obtained when the liquid freeze. However, below −76.9◦C, the α forms spontaneously convert into β form:P4(s,α) → P4(s,β)(a) Predict the signs of ∆H and ∆S for this process.(b) Predict which form of phosphorus has the more ordered crystallinestructure (has the smaller positional probability).
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.14PAE: Enthalpy changes often help predict whether or not a process will be spontaneous. What type of...
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5. Two white crystalline forms of phosporus. Both forms contain P4 molecules
but the molecules are packed together in different ways. The α forms is
always obtained when the liquid freeze. However, below −76.9
◦C, the α
forms spontaneously convert into β form:
P4(s,α) → P4(s,β)
(a) Predict the signs of ∆H and ∆S for this process.
(b) Predict which form of phosphorus has the more ordered crystalline
structure (has the smaller positional probability).
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