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Allotropes are consisted of atoms of the same element they have different properties because their<br />
structure is different.<br />
13.4 Changes of State<br />
Sublimation<br />
21. Sublimation- The change of a substance from a solid to a vapor without passing through the liquid<br />
state.<br />
This occurs when solids, like liquids, have a vapor pressure. Dry ice hace a low<br />
Temperature of -78 degrees celsius.<br />
Example: organic chemist use sublimation to separate mixtures and to purify<br />
compounds.<br />
Phase Diagrams<br />
22. Phase diagram- the conditions of temperature and pressure at which a substance exists as a<br />
solid, liquid, or gas (vapor).<br />
23. Triple Point- describes the only set of conditions at which all three phases can exist in equilibrium<br />
with one another.<br />
A diagram in which it shows the phases of elements. Such as water in shows the boiling point the<br />
melting point and what it would take to make it a gas or ice. It gives the number at which it would<br />
change. Triple point shows the coordinates to pinpoint the degree of temperature to make it freeze or<br />
melt etc.<br />
Example: this diagram shows that depending on the pressure and the<br />
Other factor of temperature makes a direct correlation with what the<br />
State of matter the substance will be.<br />
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