The degree of freedom at triple point is () A) 1 B) 0 C) 2 D) uncertain The degr

Question

The degree of freedom at triple point is () A) 1 B) 0 C) 2 D) uncertain The degree of freedom of water at vapor liquid equilibrium is () A) -1 B) 0 C) 1 D) 2 If a cooling curve has a complete halt at certain stage, the mixture is () a) at two phase equilibrium B) at three phase equilibrium C) at a condition of zero degree of freedom D) at a unknown condition. Which of the following is a single-phase system? () (A) a mixture of extremely line powder of monoclinic and rhombic sulfur (B) bleaching powder (C) a pile of urea grain with different sizes (D) ink In the following phase diagram, the cooling curves of a, b, c and d points are: (The four cooling curves in the figures (A), (B), (C) and (D) represent a, b, c, d points from left to right) In the following two-component phase diagrams (constant pressure), which one forms both stable and unstable compounds?

Explanation / Answer

1.1) Degree of freedom at triple point (F)

F = C-P+2

C= number of components

P = Number of phases

F = 1-3+2 = 0

1.2) Degree of freedom of water at vapor- liquid equilibrium

F = C-P+2

= 1-2+2 = 1

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