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Topic: Heat of vaporization

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	BUNCKE CLINIC
		The heat of vaporization is possibly the largest source of heat loss during anesthesia.
		Moisture and heat (the heat of vaporization) are lost from the mucosa of the trachea and bronchi as water is vaporized to increase the inspired water vapor concentration.
		It is filled with cellulose baffles that trap the heat and moisture of the expired gas and then return it to the inspired gas.
	buncke.org /book/ch39/ch39_6.html (474 words)

	Heat - Latent Heat
		Latent heats of fusion vary widely, and values should always be accompanied by the temperatures at which they were measured (these are not necessarily the normal melting points).
		The latent heat of evaporation is the energy required to overcome the molecular forces of attraction between the particles of a liquid, and bring them to the vapour state, where such attractions are minimal.
		Latent heats of vaporization vary widely, and values should always be accompanied by the temperatures at which they were measured (these are not necessarily the normal boiling points).
	www.physchem.co.za /Heat/Latent.htm (785 words)

	ChemTeam: Molar Heat of Vaporization
		The molar heat of vaporization for water is 40.7 kJ/mol.
		is the symbol for the molar heat of vaporization.
		Example #4 - using the heat of vaporization for water in J/g, calculate the energy needed to boil 50.0 g of water at its boiling point of 100 °C. Solution - multiply the heat of vaporization (expressed in J/g) by the mass of the water involved.
	dbhs.wvusd.k12.ca.us /webdocs/Thermochem/Molar-Heat-Vaporization.html (429 words)

	GrassCity.Com - What's a Vaporizer?
		Vaporisers have a built-in heating element, which heats the your favourite herbs to a sub-flammable temperature, thus activating and releasing all the all active chemicals in the Herb of your choice.
		Vaporization, or volatilization is a process which releases the essential, active elements of a substance without burning it.
		Vaporization implements a cutting-edge convection technology which releases just enough heat and air to discharge these vital elements but not enough heat and air to actually combust the material.
	shop.grasscity.com /shop/grasscity/vaporizer.html (411 words)

	Search Results for "Heat of vaporization"
		The latent heat of vaporization of steam is 540 calories per gram, absorbed during...
		The heat of vaporization, or latent heat of vaporization, is the heat that must be added...
		...the heat of fusion and the change associated with the liquid-gas transition is called the heat of vaporization (see latent heat).
	www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Heat+of+vaporization (333 words)

	Heat Of Vaporization
		höyrystymislämpö (latent heat of vaporization), latentti höyrystymislämpö (latent heat of vaporization).
		Verdampfungswärme (heat of evaporation, latent heat of vaporization), latente Verdampfungswärme (latent heat of vaporization).
		förångningsvärme (latent heat of vaporization), ångbildningsvärme (latent heat of vaporization).
	www.websters-online-dictionary.org /definition/english/he/heat+of+vaporization.html (310 words)

	CONK! Encyclopedia: Heat_of_vaporization (Site not responding. Last check: )
		The heat of vaporization is a physical property of substances.
		It is defined as the heat required to vaporize one mole of a substance at its boiling point under standard pressure (101.325 kPa).
		The heat of vaporization of water is about 2260 kJ/kg which is equal to 40.8 kJ/mol.
	www.conk.com /search/encyclopedia.cgi?q=Heat_of_vaporization (127 words)

	Submarine Refrigeration and Air-Conditioning Systems - Chapter 21 Glossary
		The heat that changes the physical state of a substance from a liquid to a solid, or from a solid to a liquid; no temperature change is shown by a thermometer during the conversion process.
		The heat that changes the physical state of a substance from a liquid to a vapor, or from a vapor to a liquid; no temperature change is shown by a thermometer during the conversion process.
		A unit used in measuring the elimination of heat; one refrigeration ton is the removal of the heat that would be required to melt one ton of ice at 32 degrees F in 24 hours.
	www.maritime.org /fleetsub/refrig/chap21.htm (1402 words)

	Heat of fusion - Wikipedia, the free encyclopedia (Site not responding. Last check: )
		Heat of fusion is the thermal energy which must be withdrawn to freeze a certain mass or quantity of liquid or added to melt a certain mass or quantity of solid.
		It is also called the latent heat of fusion or the enthalpy of fusion, and the temperature at which it occurs is called the melting point.
		The energy of the heat of fusion must be withdrawn (the liquid must turn to solid) before the temperature can continue to fall.
	www.sevenhills.us /project/wikipedia/index.php/Heat_of_fusion (515 words)

	vaporization -> The Boiling Point and Latent Heat of Vaporization on Encyclopedia.com 2002 (Site not responding. Last check: )
		When heat is added to a liquid at its boiling point, with the pressure kept constant, the molecules of the liquid acquire enough energy to overcome the intermolecular forces that bind them together in the liquid state, and they escape as individual molecules of vapor until the vaporization is complete.
		This amount of heat is known as the latent heat of vaporization of the substance.
		For example, the amount of heat necessary to change one gram of water to steam at its boiling point at one atmosphere of pressure, i.e., the heat of vaporization of water, is approximately 540 calories.
	www.encyclopedia.com /html/section/vaporiza_TheBoilingPointandLatentHeatofVaporization.asp (428 words)

	Problem 1 - Vapor Pressure and Heat of Vaporization of Liquids
		Heat of vaporization is an extensive property and is usually reported in thermal units per mole (e.g., kJ/mol).
		Heat of vaporization is an important quantity in the design of heat exchangers and other chemical process units.
		Enthalpy of vaporization is also used to calculate the Hildebrand solubility parameters that are useful in solvent selection to determine the mutual compatibility of chemicals [1].
	www.cstl.nist.gov /FluidSimulationChallenge/problems/problem1.htm (1356 words)

	Science Fair Projects - Heat of vaporization
		The heat of vaporization is a physical property of substances.
		It is defined as the heat required to vaporize one mole of a substance at its boiling point under standard pressure (101325 Pa).
		The heat of vaporization of water is about 2260 kJ/kg which is equal to 40.8 kJ/mol.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Heat_of_vaporization (291 words)

	Heat of Vaporization - Snow and Avalanche Glossary (CSAC) (Site not responding. Last check: )
		The heat of vaporization is defined as the heat required to vaporize one mole of a substance at its standard boiling point.
		When heat is added to a liquid, the kinetic energy of the molecules in the liquid increases and the increased motion of the molecules is reflected by a rise in the temperature of the liquid.
		The heat required to change a liquid to a solid with no change in temperature is called the latent heat of vaporization.
	csac.org /Education/glossary/heat-of-vaporization.php (222 words)

	Heat of vaporization -- Facts, Info, and Encyclopedia article (Site not responding. Last check: )
		Because (The process of becoming a vapor) vaporization is the opposite process of (Atmospheric moisture that has condensed because of cold) condensation, the term heat of condensation is also used.
		The heat of vaporization of (Binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent) water is about 2260 kJ/kg which is equal to 40.8 kJ/mol.
		Heats of vaporization of the (One of four substances thought in ancient and medieval cosmology to constitute the physical universe) elements
	www.absoluteastronomy.com /encyclopedia/H/He/Heat_of_vaporization.htm (2169 words)

	Heat Pump
		The heat transport capability of the heat pipe is raised by increasing the wick thickness.
		Heat pipe has been, and is currently being, studied for a variety of applications, covering almost the entire spectrum of temperatures encountered in heat transfer processes.
		Heat pipes designed to move 75 watts are usually flat with fin stacks from three to six inches, in many cases with fins mounted on each side of the CPU input pad.
	www.colorado.edu /ASEN/asen5519/11heatpump_files/Heat-Pump-Text.htm (2649 words)

	USATODAY.com (Site not responding. Last check: )
		Your body's heat is supplying the energy needed to speed up the molecular motion in the sweat to turn it into water vapor.
		This heat is latent heat, and the evaporated water is carrying it away from your body - it's cooling you off.
		The amount of latent heat involved in a process depends to some extent on the temperature at which the process is occurring.
	www.usatoday.com /weather/wlatent.htm (831 words)

	H - Glossary of chemical terms
		Heat of formation is the heat evolved or absorbed when one mole of a compound is formed in their standard state from its constituent elements.
		Heat of sublimation is the energy required to convert one mole of a substance from the solid to the gas state (sublimation) without the appearance of the liquid state.
		Heat of vaporization is the heat required to convert a substance from the liquid to the gaseous state with no temperature change (also called latent heat of vaporization).
	www.ktf-split.hr /periodni/en/abc/h.html (1366 words)

	Heat of Vaporization (Site not responding. Last check: )
		Heat of vaporization is the amount of heat required to vaporize 1 mole of a liquid at its boiling point.
		2) Calculate the heat of vaporization of copper, given the data that 2.0 g of Cu absorbed 2300 cal of heat in changing from a liquid to a gas.
		The same amount of heat is given off when a gas condenses or liquifies as is absorbed when the liquid vaporizes.
	www.unit5.org /christjs/Heat_Vaporization.htm (100 words)

	Standard enthalpy change of vaporization Summary
		The heat of vaporization is the heat that is absorbed to transform a substance from its liquid state to its vapor, that is, to boil or evaporate the liquid substance completely.
		A heat of vaporization for a substance is only valid for conversion of the pure liquid to the pure gaseous state of the substance.
		Heat of vaporization is often expressed as the amount of heat (in Joules) that is required to change 1 gram of liquid into gas.
	www.bookrags.com /Standard_enthalpy_change_of_vaporization (979 words)

	What is a Refrigerant? - Teacher's Guide
		Heat is absorbed when the refrigerant vaporizes, then given off again when the refrigerant is condensed into a liquid.
		The nice thing about this demonstration is that it not only shows the heat of vaporization in action, it makes use of compounds similar to the HFC refrigerants which are being used to replace CFCs, reinforcing another topic of this module.
		You can also demonstrate heats of transition using beakers of boiling water and thermometers, showing that boiling water always has a temperature of 100°C (assuming 1 atm pressure), regardless of how rapidly it is boiling.
	www.chemheritage.org /EducationalServices/faces/teacher/env/readings/rgl.htm (684 words)

	Heat
		Heat is a way of transferring energy between a system and its surroundings that often, but not always, changes the temperature of the system.
		The heat capacity of a substance is the amount of heat required to raise the temperature of a defined amount of pure substances by one degree (Celsius or Kelvin).
		Heat that raises the temperature of the system can be sensed, but heat that results in a change in the state of the system from solid to liquid or from liquid to gas is latent.
	chemed.chem.purdue.edu /genchem/topicreview/bp/ch5/heat.html (592 words)

	Phase Changes
		The energy required to change a gram of a substance from the solid to the liquid state without changing its temperature is commonly called it's "heat of fusion".
		The energy required to change a gram of a liquid into the gaseous state at the boiling point is called the "heat of vaporization".
		One way to visualize this large volume change is to note the volume of 18 ml of water in a graduated cylinder as the volume occupied by Avogadro's number of water molecules in the liquid state.
	hyperphysics.phy-astr.gsu.edu /hbase/thermo/phase2.html (439 words)

	Bambooweb: Heat of vaporization
		The heat of vaporization is a physical property of substances.
		It is defined as the heat required to vaporize one mole of a substance at its boiling point under standard pressure (101325 Pa).
		The heat of vaporization of water is about 2250 kJ/kg which is equal to 40,6 kJ/mol.
	www.bambooweb.com /articles/h/e/Heat_of_vaporization.html (138 words)

	Search: Heat of Vaporization
		If the heat of vaporization of water at 100°C is 539 calories, then subtracting the 41 calorie work component suggests that the actual binding energy of the...
		Latent heat of fusion Latent heat of vaporization Heating/cooling curves...
		The standard enthalpy change of vaporization, ?vHo, also (less correctly) known as the heat of vaporization is the energy required to transform a given...
	www.webmarket.com /webmkt.webmkt/search/web/Heat%2Bof%2BVaporization/-/-/1/-/-/-/1/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/302349/right (301 words)

	Steam, vapor, density, latent, sensible heat vaporization, specific, volume, pressure, dynamic viscosity, enthalpy
		Sensible Heat, it is the quantity of heat contained in 1 kg of water according to the selected temperature.
		Heat necessary to transform 1 kg of ebullient water into vapour without change of temperature (thermal energy necessary during the change of state liquid to the state vapour).
		Quantity of heat necessary to increase the temperature of one Celsius degree on a unit of mass of 1 kg of steam.
	www.thermexcel.com /english/tables/vap_eau.htm (249 words)

	College Physics for Students of Biology and Chemistry - Heat Flow
		Heat (denoted by Q) is thermal energy: the energy of a system of particles randomly colliding with each other and objects in their environment.
		The heat capacity (denoted by C) of an object is the ratio of change in heat to change in temperature, and the specific heat (denoted by c) of a substance is the heat capacity per unit mass.
		Q = m L. The latent heat of fusion of water is 335 kJ / kg, and the latent heat of vaporization of water is 2260 kJ / kg at 100 C. Note that the heat added or lost during a phase change does not affect the temperature during the phase change.
	www.rwc.uc.edu /koehler/biophys.2ed/heat.html (1526 words)

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