Sublimation point

Fig. 1. Standard Gibbs energy of formation vs temperature where changes in state are denoted as M, B, and S for melting, boiling, and sublimation points.

The melting, boiling, and sublimation points of many of the phosphoms hahdes are well defined and therefore serve for identification. Distillation is the easiest method of purification. Phosphoms-31 nmr can be used to analy2e mixtures of hahdes that undergo halogen-exchange reactions. 

Young s modulus, N/m heat of vaporization, kj /mol sublimation point, K triple point, K... 

Design for operation above dew point or sublimation point... 

Values were reproduced from a tabulation by J. R. Goates and J. B. Ott in Chemical Thermodynamics An Introduction, Harcourt Brace, Jovanovich. Inc., New York, 1971, pp. 137— 139. References to the original sources for these data are given there. b Normal sublimation point. 

Values for comparison melting point of W 3420 °C (highest melting metal), sublimation point of graphite approximately 3350 °C. 

By now, no car manufacturers have chosen this way. The main problem seems to be the energy requested to reach the sublimation point, and the system response time. 

Arsenic. As, at wt 74.91 exists in three modifications all corresponding to the formula As4i mw 299.64. The most common form is the crystalline or a-form, known also as metallic arsenic. Its mp is 814° at 36 atm press, sublimation point 615, d 5 = 72 at RT (5.6-5.9 for commercial grade) and hardness 3.5 Mohs. Prepn props are given in Refs 1-6 toxicity, fire expln hazards of As dust are discussed in Ref 7. Arsenic is used in some alloys and for hardening lead shot... 

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