Asked by: Mansor Lanuza
home and garden indoor environmental quality

Why is naphthalene not heated directly?

Last Updated: 2nd April, 2021

This is because to avoid of the direct heat of naphthalene, which can produce poisonous and flammable vapor gas. .

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Also to know is, what happens to naphthalene when heated?

When heated at 80 °C, napthalene rapidly sublimes directly from a solid into a gas, eventually leaving nothing remaining in the crucible. On cool surfaces, the gaseous naphthalene will re-solidify to form needle-like crystals.

Beside above, why naphthalene must be stirred continuously? In the cooling of naphthalene, the boiling tube containing the liquid naphthalene is cooled inside a conical flask. This is to ensure that an even cooling process is carried out. Stirring the naphthalene continuously also ensures even heating or cooling.

People also ask, why is water bath used instead of direct heating?

It is also used to enable certain chemical reactions to occur at high temperature. Water bath is a preferred heat source for heating flammable chemicals instead of an open flame to prevent ignition.

What are the side effects of naphthalene?

Some of the symptoms that occur with hemolytic anemia are fatigue, lack of appetite, restlessness, and a pale appearance to your skin. Exposure to a large amount of naphthalene, such as by eating mothballs, may cause nausea, vomiting, diarrhea, blood in the urine, and a yellow color to the skin.

Related Question Answers

Carolann Eicker


What is naphthalene commonly used for?

Naphthalene is made from crude oil or coal tar. It is also produced when things burn, so naphthalene is found in cigarette smoke, car exhaust, and smoke from forest fires. It is used as an insecticide and pest repellent. Naphthalene was first registered as a pesticide in the United States in 1948.

Gerhard Diastocha


Are naphthalene balls safe?

Moth balls containing naphthalene are generally safe for use around adults and older children, if used correctly and in the right quantity. It can be very dangerous if moth balls are eaten, so it is especially important that mothballs are stored well out of the reach of small children and pets.

Somiya Zingarelli


What occurs during the melting of naphthalene?

The melting point of naphthalene is 80.0 °C. 3. There is an increase from Point A to B and also from Point C to D because when the matter is heated, heat energy is absorbed. The particles gain more energy and vibrate faster.

Nataniel Imboden


Why is there no blackening when naphthalene is heated?

What happens when naphthalene is heated? It turns into liquid and eventually into gas. Why was there no blackening of the naphthalene like that of sugar? It is due to the nature of the substance.

Malainine Lewry


Is naphthalene soluble in water?

Answer and Explanation: Naphthalene is insoluble in water because it is non-polar. This means that it cannot participate in dipole-dipole interactions or hydrogen bonding

Joice Schey


Why do naphthalene balls disappear with time?

(a): Naphthalene balls disappear with time without leaving any solid because they undergo sublimation i.e., they directly change into vapour without passing through the liquid state. The perfumes contain solvent which carries pleasant smelling vapour.

Kimi Rus


Do moth balls get rid of mice?

It was believed that by placing mothballs near a mouse nest you will get rid of your rodent problem. However this is not the case. The amount of naphthalene found in mothballs is a small. It's enough to deter moths and other insects, but for mice it's no problem.

Irimia Kesting


What is the difference between water bath and incubator?

An incubator is a device used to grow and maintain microbiological cultures or cell culture. While, waterbath have a digital or analogue interference to allow users to set a desired temperature. Water bath is a painted or coated panel that is completely immersed in demonized water.

Weijing Lengerich


What will happen if the test tube was heated without a water bath?

There are 3 reasons why it is not normally recommended: Thermal shock can cause the glass tube to shatter. Direct heat can burn or overheat the reagents. The small volume can suddenly boil explosively.

Babul Afanador


Why does a water bath need to shake?

Water Bath Shaker (Shaking Water Bath) The purpose of a water bath shaker is to steadily shake and mix samples while maintaining a constant temperature. They are used for application such as culturing cells, hybridization, and molecular biology assays.

Elvio Lalli


What does water bath do?

A water bath is simply a pan of hot water placed in the oven, and using this method has two benefits when baking. First, a water bath adds moisture to the oven and this is important for baking foods like cheesecakes, which tend to crack from the heat of the oven, or custards which can become rubbery without moist heat.

Yalal Gradinaru


What is the working principle of water bath?

Working principle of water bath: The Cu50 sensor transfer water temperature to resistance value, amplified and compared by integrated amplifier, then output the control signal, efficiently control the average heating power of electric heating tube and maintain water in constant temperature.

Urcesino Zhatkov


Are naphthalene balls flammable?

Naphthalene is a COMBUSTIBLE SOLID. It may also be transported in a “molten” or heated form. The vapor given off when Naphthalene is heated is FLAMMABLE and a DANGEROUS FIRE HAZARD. Use dry chemical, CO2, water spray or alcohol-resistant foam as extinguishing agents.

Teodolinda Vogg


What is a cooling curve in chemistry?

A cooling curve is a line graph that represents the change of phase of matter, typically from a gas to a solid or a liquid to a solid. The independent variable (X-axis) is time and the dependent variable (Y-axis) is temperature. The amount of energy required for a phase change is known as latent heat.

Elda Karobalsk


How dangerous is naphthalene?

If swallowed, naphthalene can damage red blood cells, causing kidney damage and many other problems. It can affect how blood carries oxygen to the heart, brain, and other organs. It can also cause nausea, vomiting, abdominal pain, seizures and coma. Breathing in the fumes over a period of time can cause poisoning, too.

Derrick Capape


Is smelling naphthalene balls harmful?

Each active ingredient can cause different health effects if the exposure is high enough. Mothballs slowly turn from solids to toxic vapor. When you smell mothballs, you are inhaling the insecticide. Mothballs can also be dangerous if they are chewed or eaten.

Navin Twelenkamp


What is naphthalene commonly used for?

Naphthalene is an aromatic hydrocarbon found in coal tar or crude oil. Naphthalene is used in the manufacture of plastics, resins, fuels, and dyes. It is also used as a fumigant insecticide that works by turning directly from a solid into a toxic vapor.

Yon Reinosa


What precautions should you take with naphthalene?

Use a fume hood if handling large quantities. Avoid skin and eye contact. Avoid inhalation of the vapour. Avoid ingestion.