Contents
What is the melting point for naphthalene?
80.26 °C
Naphthalene/Melting point
How will you determine the melting point of naphthalene in laboratory?
Procedure to determine the melting point of Naphthalene:
- Take a capillary tube and close its one end by heating the end in the flame for 2-3 minutes while continuously rotating it.
- Take naphthalene on a tile and crush it into a fine powder.
How do you determine melting point?
Methods of Measuring Melting Point The most common and most basic method of determination is the capillary method. This method involves placing the sample in a capillary tube and running an experiment that will heat the sample until it reaches melting point. The melting point can then be recorded.
Does naphthalene have a high or low melting point?
Naphthalene is an extremely simple and nonpolar compound, yet it has a significantly higher melting point than diphenylamine (a similar enough structure that is not only heavier, but has a dipole-inducing amine) and water (famously super polar).
Why does naphthalene have a high melting point?
Naphthalene has a higher melting point than biphenyl because naphthalene is a polar compound while biphenyl is a non-polar compound. It is because polar compounds have strong intermolecular forces. …
Is naphthalene same as camphor?
As nouns the difference between camphor and naphthalene is that camphor is (organic compound) a white transparent waxy crystalline isoprenoid ketone, with a strong pungent odour, used in pharmacy while naphthalene is a white crystalline hydrocarbon manufactured from coal tar; used in mothballs.
How is the determination of melting point useful?
Determining the melting point of a compound is one way to test if the substance is pure. Impurities tend to depress and broaden the melting range so the purified sample should have a higher and smaller melting range than the original, impure sample.
Which element has the highest melting point?
Carbon
The chemical element with the lowest melting point is Helium and the element with the highest melting point is Carbon.
How is the melting point of naphthalene determined?
The animation below shows the procedures of the heating and cooling of the naphthalene. 1. 3 spatulas full of naphthalene powder are placed in a boiling tube. 2. A 500 ml beaker is filled with water until it is about full. It is then placed on a tripod stand. 3.
Is the naphthalene in a liquid or solid state?
Naphthalene is in solid state at any temperature below its melting point. The particles are very closely packed together in an orderly manner. The forces between the particles are very strong. The particles can only vibrate at a fixed position. Naphthalene exists in both solid and liquid states.
Why is a water bath good for heating naphthalene?
A water bath is suitable in this experiment because the melting point of naphthalene is below 100 ºC. If the melting point of the substances is above 100 ºC, the water bath will have to be replaced by an oil bath. Besides naphthalene, the other substance that is suitable for heating by the water bath is acetamide.
How to determine the melting point of an organic compound?
Naphthalene, benzoic acid, the aluminium block, stand with clamp, capillary tube, tripod, thermometer, and kerosene burner Take a capillary tube and close its one end by heating the end in the flame for 2-3 minutes while continuously rotating it. Take naphthalene on a tile and crush it into a fine powder.