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Topic: Sublimation point

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	Ch06
		The process of both sublimation and evaporation depends ultimately on the relationship of temperature and pressure to the kinetic energy (energy of constant motion) present in water as a liquid or solid.
		At this point, the water vapor and ice are in a state of equilibrium; the pressure at which this occurs is called the equilibrium vapor pressure.
		As ice sublimes heat is absorbed; this energy is required to speed up the release of molecules in the form of water vapor.
	www.unesco.org /webworld/ramp/html/r8707e/r8707e06.htm (1858 words)

	Boiling point - Wikipedia, the free encyclopedia
		The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure.
		The boiling point corresponds to the temperature at which the vapor pressure of the substance equals the ambient pressure.
		Likewise, the boiling point decreases with decreasing ambient pressure until the triple point is reached.
	en.wikipedia.org /wiki/Boiling_point (888 words)

	Sublimation Information Center - sublimation mugs (Site not responding. Last check: 2007-11-02)
		Sublimation of an element or substance is a conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.
		However, for some elements epson 1280 sublimation printer dye sublimation printing sublimation printers or substances at some pressures the material may transition picture of sublimation sublimation tiles directly from solid epson sublimation printers to the gaseous state.
		In sublimation ink alchemy, sublimation typically refers to the process by which a substance is heated artainium™ uv sublimation ink to a vapor, dye sublimation handbags then immediately collects as sediment on the upper portion and neck of the heating medium (typically a retort or alembic).
	www.scipeeps.com /Sci-Chemistry_Topics_S/Sublimation.html (390 words)

	CHM 230 Lab Manual Melting Point (Site not responding. Last check: 2007-11-02)
		The freezing point of a liquid is the same temperature as the melting point of its solid.
		If its melting point is the same as that of the unknown, it is likely that your unknown and the compound with which you mixed it are the same.
		Melting Point of an Impure Substance Melting Point of a Mixture of (a) and (b) ___________________________oC III.
	chemlab.pc.maricopa.edu /labbooks/meltingPoint.html (2127 words)

	[No title]
		Sublimation is actually a phase change in which heat is applied to a substance in the solid phase, causing it to pass directly into the gas phase without undergoing an intermediate liquid phase.
		The sublimation point is defined in the lab manual as the temperature at which the vapor pressure of the solid equals and eventually surpasses the atmospheric pressure of the vessel in which the “crude” substance is contained.
		During the sublimation process, the movement of the crystal precipitate from the solid deposit of crude crystal at the bottom of the test tube to a fine “white mist” was observed.
	www.people.virginia.edu /~tw8h/241/Exp5revised.doc (4407 words)

	Phase Change (Site not responding. Last check: 2007-11-02)
		The location of the triple point of a pure substance occurs at a single definite pressure and temperature characteristic of that substance.
		For water, the triple point lies at 273.16 K and 611 Pa or 4.58 Torr (remembering that 760 Torr is atmospheric pressure), and the three phases of water coexist in equilibrium at no other combination of pressure and temperature.
		In (a), for water, note the triple point A (0.0098°C, 4.58 torr), the normal melting (or freezing) point B (0°C, 1 atm), the normal boiling point C (100°C, 1 atm), and the critical point D (374.4°C, 217.7 atm).
	www.tenafly.k12.nj.us /~shilfstein/links8.htm (911 words)

	Melting point caffeine
		Melting point: 237 C Boiling point: (sublimes) Vapour density: Vapour pressure:...
		I record a melting point range of 198 - 240 degrees celcius acetanilide's melting point is 114.3 caffeine's melting point is 238...
		Caffeine, or 1,3,7-trimethylxanthine, is a purine alkaloid with a melting point of 238 C. It exists at room temperature as a white, odorless,...
	www.angelfire.com /planet/gary34/meltingpointcaffeine.html (628 words)

	Triple Point and Sublimation (Site not responding. Last check: 2007-11-02)
		It affects circulation which might speed up or slow down sublimation, but it cannot change the basic process: if the vapor pressure of the ice is higher than the partial pressure of water in the air, it sublimes.
		Thus, when we say the triple point of water is at 0.0098C and 4.58torr, this is the condition at which the solid, liquid and vapor phase of water all exist -- at equilibrium.
		At the triple point however, there is no net change in the amount of ice, liquid water, and water vapor (even though there are individual molecules that are changing phases) - and so the amount of each substance is constant.
	www.newton.dep.anl.gov /askasci/chem03/chem03514.htm (469 words)

	Phase Diagrams
		This phase change is called sublimation (the reverse process is called deposition or desublimation) and the temperature at which it occurs is called the sublimation point (or sublimation temperature).
		The sublimation temperature of water ice is 198 K under Martian atmospheric conditions.
		The value of the solid-gas phase boundary at a given pressure is a sublimation point.
	hypertextbook.com /physics/thermal/pressure-temperature (1460 words)

	PhotoMed Cameras
		It is impossible for a flash that is located in a single position to properly illuminate all of the types of photographs that are taken in a dental office.
		The point flash on a 35mm camera is designed to rotate around the end of the lens so that you can direct the light from the flash properly for different views.
		Even though digital and film are not equal, digital has reached the point where it is more than adequate to handle the needs of most dentists.
	photomed.net /faq.htm (1671 words)

	Phase State Changes: World of Earth Science
		The condensation point is the temperature at which a gas or vapor changes to a liquid.
		The freezing point of a liquid is the temperature at which the liquid changes to a solid.
		The sublimation point of a substance is the temperature at which it changes directly from a solid to a vapor.
	science.enotes.com /earth-science/phase-state-changes (790 words)

	Phoenix College - CHM 230 Melting Points (Site not responding. Last check: 2007-11-02)
		However, the presence of a foreign particle in a crystal lattice interrupts its uniform structure and the forces of attraction are weakened.
		Suppose two compounds A and B have identical melting points of 131-2°C and appear to be identical.
		A capillary tube loaded (see B on next page) with a sample whose melting point is to be taken should then be attached to the thermometer with a small rubber band.
	chemlab.pc.maricopa.edu /labbooks/230/meltingpoints/index.html (2098 words)

	Phase Diagrams
		At this introduction point, we take a look of the behavior of water and carbon dioxide when the temperature and pressure are changing.
		In (b), for carbon dioxide, note the triple point X(-56.4°C, 5.11 atm), the normal sublimation point Y(-78.5°C, 1 atm), and the critical point Z (31.1°C, 73.0 atm).
		The melting point is higher than -56.4°C. Carey uses carbon dioxide to extract an organic compound from a rock bed.
	www.science.uwaterloo.ca /~cchieh/cact/c123/phasesdgm.html (1045 words)

	Sublimation
		It melts/decomposes at 236 C. Set the melting point apparatus to 4.9.
		If the vapor pressure of the impurities in a solid are significantly lower than that of a solid sample, then sublimation can be used as a purification method.
		True sublimation instead of evaporation is achieved when the pressure is reduced to P
	www.ipfw.edu /chem/265/265nt01l.htm (316 words)

	Caffeine Lab Pre/Post-Lab Activities
		Draw a phase diagram and label the x and y axes, the three phases, triple point, and critical point.
		Sublimation: Where a substance undergoes a phase change from solid to gas, without going through the liquid phase.
		Sublimation: define it; discuss why it is being used in this experiment, relating choice of method to properties of compounds involved.
	departments.oxy.edu /tops/Caffeine/caffprepost.htm (1402 words)

	[No title] (Site not responding. Last check: 2007-11-02)
		Usually, a material has a lower sublimation point temperature than melting point temperature, hence sublimation starts to occur first.
		In some cases, though, you may find that the melting point temperature is lower than sublimation point temperature.
		Click on any element to see its melting point and sublimation temperature at 10-3 torr (note that some elements have already melted before their vapor pressure reaches 10-3 torr, the sublimation point).
	invsee.asu.edu /Modules/lightbulb/Bulbed2.doc (1720 words)

	CHEM 111 Summer 2003 Study Guide (Site not responding. Last check: 2007-11-02)
		Be familiar with the terms: London dispersion forces, polarizability, viscosity, surface tension, fusion, freezing, vaporization, condensation, sublimation, deposition, heat of fusion, heat of vaporization, heat of sublimation, melting point, freezing point, normal boiling point, crystal lattice.
		Be able to calculate the concentrations of all components at the equivalence point during the following types of acid/base titrations: strong acid-strong base, weak acid-strong base, strong acid-weak base.
		Be able to calculate the change in entropy accompanying the melting of a pure solid at its normal melting point; the vaporization of a pure liquid at its normal boiling point; or the vaporization of a pure solid at its normal sublimation point.
	www.towson.edu /users/debye/chem111/2003s/111_03s_st.html (2106 words)

	Q1.1 CHEM 113 95
		The boiling point of flourine gas should be about the same as
		Estimate the normal boiling point of the substance represented above.
		A solid sample is at its normal melting point.
	www.campbell.edu /faculty/bryan/CHEM113/test2c/T2CH113SP98.html (508 words)

	The Physics Hypertextbook™: Topic Summaries: Thermal Physics
		The kelvin is a fundamental unit; that is, it cannot be reduced to any simpler units.
		By definition, the kelvin is 1/273.16 of the thermodynamic temperature of the triple point of water; therefore …
		the triple point of water is the upper fixed point,
	hypertextbook.com /physics/thermal/summary.shtml (1417 words)

	C121E5.htnl
		Which one of the following has the lowest normal boiling point.
		All will have the same normal boiling point.
		All of the would have the same boiling point.
	www.utm.edu /departments/cens/chemistry/121T5_AWH_000.htm (364 words)

	Chapter 17 Practice Test: Science 8 E-KCS
		A temperature of 0 K is (1.) the freezing point of water.
		The point at which all particle motion stops is called (1.) freezing point
		The diagram at the right shows a pot of water being heated by a fire source at its base, as well as the convection currents within the water in the pot.
	www.ekcsk12.org /science/science8/chapter17practicetest.html (429 words)

	Beilstein and Gmelin Databases: Worksheet #5: User-Defined Views (Site not responding. Last check: 2007-11-02)
		Find sublimation point data for inorganic substances which have a boiling point>500°C. Include the accompanying bibliographic data.
		This is a relatively large record with 600+ reactions and 49 data fields.
		Sublimation data is found in INFORMATION ON PHASE TRANSITIONS under PHYSICAL PROPERTIES.
	chemistry.library.wisc.edu /beilstein/5userview.htm (320 words)

	Boiling Point References
		When a structure matches a database structure (via an exact atom-to-atom connection match), the boiling point experimental value is retrieved.
		The sublimation point indicates the temperature where the pressure of the vapor in equilibrium with the solid reaches 101.325 kPa.
		Melting and boiling point values are for nitrogen tetroxide.
	risk.lsd.ornl.gov /tox/bp_ref.shtml (573 words)

	Start A T-Shirt Printing Business Today!
		The sublimation inks included are a set of (CMYK) cartridges that fit into a standard Espon C88+ printer.
		These sublimation cartgidges for the C88+ printer cost less because they are smaller in size compared to the bulk ink system offered above.
		Hanes Sublimation Maker must be used with these sublimation inks and it is included in this package.
	www.bestblanks.com /biz (2180 words)

	Labyrinth Books
		Sweet, funny, sad, true: Sublimation Point, like a perfect pop song, makes the listener glad to be alive.
		We can read these poems as miniatures, little worlds composed to magnify the drama of forces converting us, moment by moment, into who we are.
		Possessing a protean intelligence, a classical sensibility, and an inordinate appetite for the uncanny, Schneiderman seeks the point at which everything changes without an outward sign.
	www.labyrinthbooks.com /events_detail.aspx?evtid=93 (329 words)

	General Chemistry Check Off List (Site not responding. Last check: 2007-11-02)
		Chemical Change- change in matter where the composition or makeup of the matter is altered.
		NOTE: Physical property- a property where the matter under observation does not alter its composition as the measurement of the property is performed.
		Chemical Property- a property where the matter under observation has its composition altered as the measurement is being taken.
	members.aol.com /profchm/nlcch1.html (1229 words)

	CHEM 111.040/041 Summer 2001 Study Guide
		10.28); know what is meant by the triple point and by the critical point.
		Be familiar with the effect of solute dissociation upon the freezing point depression and boiling point elevation problems.
		Know how to define reaction rate in terms of the reactant or product concentrations; how the rate is related to a graph of reactant and/or product concentration versus time.
	www.towson.edu /~debye/chem111/2001S/111_01s_st.html (2239 words)

	Customized Floor Mats from Custom-Mats.com
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