0
During devitrification of glass, the amorphous structure of the glass transforms into a crystalline structure. This occurs when the glass is heated to a specific temperature at which the atoms in the glass begin to rearrange into a more ordered pattern, resulting in the formation of crystals within the glass matrix. This process is influenced by factors such as temperature, time, and composition of the glass.
Add your answer:
Earn +20 pts
Do glass shrink when heated?
No, glass does not shrink when heated. In fact, glass expands when heated due to increased molecular movement. If glass is subsequently cooled down rapidly, it can crack or shatter due to thermal stress.
How can ordinary glass be made heat-resistant?
Ordinary glass can be made heat-resistant by adding certain compounds such as boron or alumina during the manufacturing process. These compounds help to strengthen the molecular structure of the glass, making it more resistant to thermal shock. Additionally, the glass can be treated with a special coating or undergo a tempering process to enhance its heat resistance.
Is making glass from sand a chemical change?
Yes, making glass from sand is a chemical change because the composition of the sand is altered during the heating process to form glass. The structure and properties of the material change, indicating a chemical transformation.
You drop a handful of salt into a glass of water what BEST describes what is happening inside the glass at the molecular level?
When the salt is dropped into the water, the salt crystals dissolve into their individual sodium and chloride ions. These ions become surrounded by water molecules due to their polar nature, forming a solution of salt water. The water molecules surround the ions through hydrogen bonding, allowing the ions to move freely throughout the water.
Do the properties of glass changed by heating?
Yes, heating glass can change its properties. When heated, glass may become softer, more malleable, and easier to shape due to increased molecular mobility. However, overheating can cause the glass to lose its shape, crack, or even melt, depending on the temperature achieved.
What solid is not conductive and has a low melting point?
You think probable to a glass.
Electrons do not flow through the molecular structure of glass for this reason glass is classified as?
Glass is classified as an insulator because its molecular structure does not allow electrons to flow easily through it. This means that glass does not conduct electricity well and is often used to insulate electrical circuits to prevent current flow.
Do glass shrink when heated?
No, glass does not shrink when heated. In fact, glass expands when heated due to increased molecular movement. If glass is subsequently cooled down rapidly, it can crack or shatter due to thermal stress.
When drops of water on the outside of the glass dry off what is happening?
What happening is the water droplets have evaporated.
How does heat expand a glass?
When heat is applied to glass, the glass absorbs the heat energy causing its molecules to move faster and spread apart. This increase in molecular motion results in the expansion of the glass material, causing it to expand in all directions.
Which is smoother- plastic or glass?
Glass is typically smoother than plastic due to its non-porous surface and molecular structure. Glass is also less likely to accumulate scratches or imperfections compared to plastic, leading to a smoother feel.
Does H2O represent an ion found in a glass of water?
No. H2O is the chemical formula for the molecular compound water.
How chemistry is related to glass industry?
Knowing the molecular make-up of materials (such as glass) is important in understanding both their properties and how to synthesise them. Chemistry thus plays an important part in the glass industry, being the science of matter.
Is glass a intermerlicular force or intra merlicular force?
Glass is held together by intra-molecular forces, specifically covalent bonds between silicon and oxygen atoms in a network structure.
How can ordinary glass be made heat-resistant?
Ordinary glass can be made heat-resistant by adding certain compounds such as boron or alumina during the manufacturing process. These compounds help to strengthen the molecular structure of the glass, making it more resistant to thermal shock. Additionally, the glass can be treated with a special coating or undergo a tempering process to enhance its heat resistance.
Is making glass from sand a chemical change?
Yes, making glass from sand is a chemical change because the composition of the sand is altered during the heating process to form glass. The structure and properties of the material change, indicating a chemical transformation.
How does the density differ between a glass and a plastic cup that have almost exactly the same volume?
The density of glass is generally higher than that of plastic, so a glass cup would be heavier than a plastic cup of the same volume. This is due to the difference in the composition and molecular structure of glass and plastic materials.
