[Solved] A 1.75-cm diameter naphthalene mothball i
A 1.75-cm diameter naphthalene mothball is suspended in an air stream at 280 K, 1.0 atm, and constant velocity of 1.4 m/s. Solid naphthalene exerts a vapor pressure of 2.8 Pa at 280 K. Consequently, the naphthalene very slowly sublimes into the passing air stream, with the rate limited by convective mass transfer.
Naphthalene | Mothballs, Carcinogen, Polycyclic Aromatic …
naphthalene, the simplest of the fused or condensed ring hydrocarbon compounds composed of two benzene rings sharing two adjacent carbon atoms; chemical formula, C 1 0 H 8. It is an important hydrocarbon raw material that gives rise to a host of substitution products used in the manufacture of dyestuffs and synthetic resins.
Solved Naphthalene has a relatively high vapor pressure for
Naphthalene has a relatively high vapor pressure for a solid (because of its volatility, naphthalene is the active ingredient in some brands of mothballs). In view of this, what might happen if you place naphthalene under vacuum or in an oven for several hours to dry it?
Polyaromatic Hydrocarbons (PAHs): Sources, Distribution, …
In addition, depending upon origin of their formation, the sources of PAH contamination in aquatic ecosystem is categorized into three groups, namely, pyrogenic (smaller than two to three rings), petrogenic (molecules with 4–6 rings and a greater size), and biogenic origin (Mojiri et al. 2019).Pyrogenetic PAHs are created when organic matter accidentally …
Solved A long cylinder of solid naphthalene rotates in air
Answer to A long cylinder of solid naphthalene rotates in air. Cylinder of diameter D Figure P6.58.1 Solid naphthalene cylinder. 0 10 i 6.58 A long cylinder of solid naphthalene rotates in air about its axis, as shown in Fig. P6.58.1. i The rotation induces motion in the surrounding b air, but no external flow other than this is im- t posed on the system.
Thermal equation of state of solid naphthalene to 13 GPa …
The elastic behavior of solid naphthalene was studied by in situ synchrotron powder X-ray diffraction up to 13 GPa and 773 K and first principles computations to 20 GPa and 773 K. Fitting of the P-V experimental data to Vinet equation of state yielded T 0 = 8.4(3) GPa and T' = 7.2 (3) at V0 = 361 Å(3), whereas the thermal expansion coefficient ...
Variation in the properties of liquid-solid binary systems …
DOI: 10.3103/S1068364X07090062 Corpus ID: 97572292; Variation in the properties of liquid-solid binary systems formed by naphthalene homologs @article{Belousova2007VariationIT, title={Variation in the properties of liquid-solid binary systems formed by naphthalene homologs}, author={Olga A. Belousova}, journal={Coke and Chemistry}, year={2007}, volume={50}, …
Solved Consider the placing 3.00 g of solid naphthalene in a …
Consider the placing 3.00 g of solid naphthalene in a 5.00 L container at 298 K. After some time equilibrium is established between solid and gaseous naphthalene (Kc = 4.29 x 10-6) : 1. naphthalene(s) naphthalene(g) What is the pressure of gaseous naphthalene at equilibrium? A) 1.00 atm B) 5.25 x 10-4 atm C) 1.05 x 104 atm D) 73.4 atm E) 4.29 x ...
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SOLUBILITY OF SOLID NAPHTHALENE IN ETHYLENE AT …
1. Thermodynamics of Solid-Vapor Equilibria The solubility of a nonvolatile solute in a super-critical gas is determined from standard thermody-namics16}. Solid-vapor equilibria considered in this study are those for which the solid phase is assumedto be pure solute (component 1) and the vapor phase is a
What is Naphthalene? (with pictures)
Naphthalene is a carbon-based chemical that is most commonly used to make mothballs.It has the chemical formula C 10 H 8, and is known within the scientific community as a polycyclic aromatic hydrocarbon.This chemical is found in nature but scientists can also synthetically create it in a lab. In addition to mothballs, it is used to make insecticide, many …
naphthalene
naphthalene năfˈthəlēnˌ [key], colorless, crystalline, solid aromatic hydrocarbon with a pungent odor. It melts at 80℃, boils at 218℃, and sublimes upon heating. It is insoluble in water, somewhat soluble in ethanol, soluble in benzene, and
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Solved Naphthalene (C10H8) is a solid at room temperature.
Naphthalene (C 10 H 8) is a solid at room temperature. It sublimes by the following process. Using the data below determine the best estimate of the sublimation temperature for naphthalene (the temperature at which this reaction will become spontaneous under standard state conditions). C 10 H 8 (s) → C 10 H 8 (g) ∆H° = 72.1 kJ/mol . ∆S ...
Solved 6. Calculate the maximum solubility in terms of mole
Calculate the maximum solubility in terms of mole fraction of solid naphthalene in liquid toluene at 25 oC is the enthalpy of fusion of naphthalene is 19.123 kJ/mol and its melting point is 78.2 oC. Your solution's ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on.
Naphthalene
Alkyl naphthalene is a choice based on features like stability for long durability and seal compatibility. Naphthalene Solid-Naphthalene solid is a very common form of naphthalene. It occurs white in color. It is a crystalline volatile solid. It has an odor like coal tar. Naphthalene is obtained from the petroleum distillation of coal tar.
Solved (a) Use average bond enthalpies (Table 8.3) …
Question: (a) Use average bond enthalpies (Table 8.3) to estimate ΔH for the atomization of naphthalene, C10H8 : (b) Determine ΔH for the atomization of naphthalene using Hess's law and the data in Appendix C. (ΔHf∘ of solid …
Naphthalene, crude or Naphthalene, refined
Naphthalene is an organic compound with formula C10H8. It is the simplest polycyclic aromatic hydrocarbon, and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromatic hydrocarbon, naphthalene's structure consists of a fused pair of benzene rings.
a sample of pure solid naphthalene chs weighing 06410 g is …
A sample of pure solid naphthalene (C10H8) weighing 0.6410 g is burned completely with oxygen to CO2(g) and H2O(l) in a constant-volume calorimeter at 25°C. The amount of heat evolved is observed to be 25.79 kJ. (The Mw of C10H8 is 128.7 g/mol, R = 8.3145 J/(K·mol)). Write and balance the chemical equation for the combustion reaction.
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Density of Naphthalene in 285 units and reference information …
Naphthalene weighs 1.162 gram per cubic centimeter or 1 162 kilogram per cubic meter, i.e. density of naphthalene is equal to 1 162 kg/m³; at 20°C (68°F or 293.15K) at standard atmospheric pressure.. In Imperial or US customary measurement system, the density is equal to 72.5413 pound per cubic foot [lb/ft³], or 0.67168 ounce per cubic inch [oz/inch³] .
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Naphthalene
Naphthalene (CAS Registry Number 91-20-3; molecular formula C10H8) is a white crystalline powder with a characteristic odour (of mothballs). It is a two-ring aromatic hydrocarbon isolated from coal tar. Synonyms used are antimite, …
Naphthalene — production and uses
Naphthalene was first isolated from coal tar in 1819 by Alexander Garden; it represents about 10% of this complex mixture of aromatics. The industrial importance of naphthalene dates from the latter half of the last century, owing mainly to the ease with which it can be converted into sulfonic acids and thence also to the naphthols, for use as dyestuffs intermediates.
Solid naphthalene crushing and melting device
The utility model relates to a solid naphthalene is broken, is melted device, add feed bin, solid naphthalene cracker, naphthalene melting stirred tank A and naphthalene melting stirred tank B including solid naphthalene, install solid naphthalene on the feed inlet of solid naphthalene cracker and add the feed bin, be connected with on the discharge gate of solid naphthalene …
Naphthalene: Alkyl & Chemical Properties
The naphthalene vapours are collected, cooled, condensed, and then recrystallized to obtain solid naphthalene. The separation of the components of the coal tar is possible due to the differences in their boiling points. Naphthalene, with its boiling point of around 218°C, sublimates in the second distillation process, separating it from the ...
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Solved (b) A solid naphthalene sphere is placed in a flow of
Question: (b) A solid naphthalene sphere is placed in a flow of air at 135°C at a pressure of 1.013 x 105 Pa. The sphere will slowly sublime into the air stream by diffusion alone. The rate of sublimation per unit area Nar (flux) is: DABP Nar In RTr ( Using the above in combination with a mass balance on the system, determine the time taken to ...
Solved At 35°C the vapor pressure of solid naphthalene is
At 35°C the vapor pressure of solid naphthalene is 2.80 x 10- bar and its density is 1.145 g cm. Calculate the solubility of naphthalene in compressed ethylene at 35°C and at total pressure of 30 bar: (a) Using the ideal-gas law. (b) Using the virial equation of state truncated after the second term. For the second yirial coefficient B use ...
Solved A spherical ball of solid, nonporous naphthalene,
A spherical ball of solid, nonporous naphthalene, a"mothball," is suspended in still air. The naphthalene ball slowly sublimes, releasing the naphthalene vapor into the surrounding air by molecular diffusion-limited process. Estimate the time required to reduce the diameter from 2.0 to 0.50 cm when the surrounding air is at 347 K and 1.0 atm ...