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This web site: www.newton.dep.anl.gov/askasci/chem00/chem00283.htm
Says this:
"Moth balls" is a generic term that can refer to at least three very
different chemical compounds: 1,4 dichlorobenzene, camphor, or naphthalene.
The melting point of these compounds is 53, 178, and 80 C. respectively. The
vapor pressure of each of these compounds at their respective melting points
is about 10 mm Hg. This vapor pressure is sufficiently high that the compounds
sublime [vaporize from the solid] if they are heated in an open environment.
Sublimation is the process of a change of physical state from solid straight to a gas. The naphthalene insecticide essentially evaporates, releasing its toxic insecticide into the air to kill off moths. This process occurs just like water would melt from ice, but into a gas instead of a liquid.
Moth balls typically undergo sublimation at temperatures above 45°C (113°F). This process involves the solid moth balls turning directly into gas without passing through the liquid phase.
Mothballs undergo "Sublimation", which is the change of state from a solid to a gas without ever becoming a liquid
Napthalene, the main component of mothballs, has a melting point of 80.23o C
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Naphthalene balls disappear with time without leaving solid why?
Naphthalene balls undergo a process called sublimation, where they change from a solid directly into a gas without transitioning through a liquid state. This causes them to gradually evaporate over time without leaving behind any solid residue.
What is the solute and solvent of moth balls in air?
In the case of moth balls in air, the moth balls themselves are the solute (the substance being dissolved or dispersed) and air is the solvent (the substance in which the solute is dissolved or dispersed). However, it's worth noting that moth balls do not actually dissolve in air but release vapors that act as repellents.
What element is in moth balls?
The main element in moth balls is typically sulfur. It is used to repel and deter insects like moths from damaging clothing and fabrics.
Do moth balls dissolve in water?
Moth balls are not water-soluble and do not dissolve in water. They are typically made from chemicals like naphthalene or paradichlorobenzene, which are designed to slowly release fumes that repel moths and other insects. Clean-up of unused moth balls should be done carefully to prevent exposure to these toxic chemicals.
Can fumes of moth balls hurt humans?
Yes, moth balls contain toxic chemicals that can be harmful to humans when inhaled in high concentrations. Prolonged exposure to moth ball fumes may lead to symptoms such as headaches, dizziness, nausea, and respiratory irritation. It is important to use moth balls according to the manufacturer's instructions in a well-ventilated area to minimize these risks.
Why naftalin balls that you used to protect clothes from moth become small?
The naphthalene balls will undergo sublimation even at room temperature. When these balls are used to protect the clothes from moths, we can identify the smell of the balls. This is due to its sublimation which makes it to become small.
What are the 4 requirements for sublimation?
The four requirements for sublimation are: a solid substance must have a high vapor pressure at a certain temperature, the pressure of the substance in the environment must be lower than its vapor pressure, the substance must be able to undergo a phase change directly from solid to gas without passing through the liquid phase, and there must be sufficient energy for the solid particles to break free and transition to the gas phase.
How does sublimation differ from condensation?
Condensation is changing from a gas to a liquid. In sublimation, substance goes directly from solid to gas without ever becoming a liquid. Moth balls and dry ice both do that.
Which phase transition occurs when moth balls slowly become smaller and eventually disappear?
The moth balls get smaller by the process of evaporation. Due to the health risks of 1,4-dichlorobenzene (newer type), and flammability of naphthalene (older type), other substances like camphor are sometimes used.
Naphthalene balls disappear with time without leaving solid why?
Naphthalene balls undergo a process called sublimation, where they change from a solid directly into a gas without transitioning through a liquid state. This causes them to gradually evaporate over time without leaving behind any solid residue.
How can moth balls be frozen?
Because when you fry moths and then freeze them they become little balls there for being frozen moth balls!
Do moth balls control gophers?
Moth balls do not control gophers. They do tend to repel them as they do not like the scent of the moth ball though.
Does heat help moth balls to disintegrate?
Yes, heat plays a large roll in the disintegration of moth balls. Ventilation is another main factor in disintegration of moth balls.
Are camphor balls and moth balls the same thing?
No, camphor balls and moth balls are not the same thing. Camphor balls are made from natural camphor and are used for their aromatic properties. Moth balls are typically made from naphthalene or paradichlorobenzene and are used as a pest deterrent for moths and other insects.
Where can you find napthalene in?
moth balls
Are moth balls sold?
Yes.
Are moth balls solid?
Yes.
