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How do you make liquid naphthalene?
Liquid naphthalene is typically obtained by melting solid naphthalene. This can be done by heating solid naphthalene to around 80 degrees Celsius until it liquefies. It is important to handle naphthalene with care as it is toxic and flammable.
What is the calorific value of naphthalene?
The calorific value of naphthalene is approximately 25,800 kJ/kg. It is often used as a standard for measuring the energy content of other substances.
A substance X on heating gives B and C What is X a compound or a mixture?
It may be a compound as CaCO3 which on heating gives CaO and CO2, it may be a mixture as mixture of Naphthalene and sand which on heating gives naphthalene and sand.
Why is a water bath used to heat the solid naphthalene?
A water bath is used to heat solid naphthalene to ensure uniform and controlled heating. This method prevents localized overheating that could lead to decomposition or degradation of the naphthalene. Additionally, the temperature of the water bath can be easily regulated, allowing for precise temperature control during the melting process. This results in a more consistent and safe melting of the solid naphthalene.
How do you separate naphthalene from common salt?
Cyclohexane and naphthalene can be separated via distillation. If you know the boiling points of cyclohexane (about 81 degrees Celsius) and naphthalene (about 218 degrees Celsius), then you can distill the mixture of both compounds and let the cyclohexane boil off first and naphthalene will boil off last due to its high boiling point. This can be done using a distillation apparatus. And as a suggestion, using gas chromatography would be very helpful if you take samples of the distillation of certain periods of time. Gas chromatography shows what compounds are in a sample, the amounts of the compound per sample, and how long the compound took to boil out of the sample. As time progresses, the amount of cyclohexane should decrease and naphthalene should increase with each sample taking.
What is the difference between Gross heating Value and Net heating value?
The heating value isthe amount of heat produced by combustion of a unit quantity of a fuelWe differentiate between gross and net heating values:Gross (or high, upper) Heating ValueThe gross or high heating value is the amount of heat produced by the complete combustion of a unit quantity of fuel. The gross heating value is obtained whenall products of the combustion are cooled down to the temperature before the combustionthe water vapor formed during combustion is condensedNet (or lower) Heating ValueThe net or lower heating value is obtained by subtracting the latent heat of vaporization of the water vapor formed by the combustionfrom the gross or higher heating value.For further information Contact: Tauseef Awan email adress microengineer.tauseef@gmail.com mob:+92306-8859595
What is calorific value of naphthalene?
100mjkg1
How do you make liquid naphthalene?
Liquid naphthalene is typically obtained by melting solid naphthalene. This can be done by heating solid naphthalene to around 80 degrees Celsius until it liquefies. It is important to handle naphthalene with care as it is toxic and flammable.
How can naphthalene be separated from a mixture of naphthalene and common salt.explain?
Naphthalene can be separated from common salt by sublimation since naphthalene sublimes at a lower temperature than common salt. By heating the mixture, naphthalene will turn directly from a solid to a gas, leaving behind the common salt as a solid residue. The naphthalene gas can then be cooled and collected back as a solid.
How do you separate naphthalene from sand?
One way to separate naphthalene from sand is by sublimation. By heating the mixture, the naphthalene will undergo sublimation, turning into a gas and leaving behind the sand. The gas can then be collected and cooled back into solid naphthalene.
What is the calorific value of naphthalene?
The calorific value of naphthalene is approximately 25,800 kJ/kg. It is often used as a standard for measuring the energy content of other substances.
Why must you use hot water bath to melt the naphthalene instead of heating it directly over a flame?
Using a hot water bath helps to heat the naphthalene gently and evenly, reducing the risk of overheating or burning the substance. Directly heating naphthalene over a flame can cause it to heat unevenly and result in combustion, which can release harmful gases and create a fire hazard.
How can you separate a mixture of naphthalene and ammonium chloride?
One way is to slurry the solid mixture with water. The ammonium chloride will dissolve and the naphthalene will not. Ammonium chloride can then be recovered by evaporating the water solution of it that is formed.
What is the value of a gross in maths?
The value of a gross is 144
A substance X on heating gives B and C What is X a compound or a mixture?
It may be a compound as CaCO3 which on heating gives CaO and CO2, it may be a mixture as mixture of Naphthalene and sand which on heating gives naphthalene and sand.
Naphthalene sublimes easily but potassium bromide does not How could you separate these two substances?
One possible way to separate naphthalene and potassium bromide is through sublimation. Naphthalene can be sublimed by heating the mixture, allowing it to vaporize and then condense back into solid form. Since potassium bromide does not sublime easily, it would remain in the solid state and can be separated from the naphthalene vapor.
What is gross value?
Gross Development Value is the retail or sale value of property after construction.
