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I'm not so sure there is a similarity. When ice melts it undergoes a phase change. The solid H2O becomes liquid H2O and energy is absorbed in the form of heat. Ice can also become a liquid at 0° C, its melting point, or colder when the pressure is significantly reduced. When chalk, typically calcium carbonate (CaCO3), is ground into powder it does not undergo any phase change. It is still solid calcium carbonate. The grinding action will release energy in the form of heat by the cause of friction. So, ice melting is a phase change that is endothermic, meaning it absorbs heat. The grinding chalk is not a phase change and is exothermic, meaning it releases heat.
What else can I help you with?
Can chalk be recycled and how?
Yes, chalk can be recycled by grinding it into a fine powder and mixing it with water to create a paste. This paste can then be molded into new chalk sticks and allowed to dry. Alternatively, chalk residue can be collected and used in other applications such as creating concrete or as a soil amendment for gardening.
Can filter paper separate chalk powder?
No, filter paper is not suitable for separating chalk powder. Chalk powder is insoluble in water, so it will not pass through the filter paper when mixed with water. To separate chalk powder from water, you can use techniques like sedimentation or decantation.
Is breaking a lump of chalk to make powder a chemical reaction?
Breaking a lump of chalk into powder is a physical change, not a chemical reaction. The chemical composition of the chalk remains the same before and after breaking it into powder.
Is chalk powder is soluble in water or not?
No chalk is not solouble. When chalk is put in water the water becomes a suspension ie the particles of chalk keep floating in water.
How do you separate camphor from chalk powder?
Camphor can be separated from chalk powder using sublimation. Heating the mixture will cause the camphor to sublime (convert directly from solid to gas) and leave behind the chalk powder. The camphor gas can then be collected and allowed to solidify back into crystals.
What kind change is grinding chalk into powder?
Grinding chalk really doesn't change the chalk except to make it into powder. So that makes it a physical change. It is much like ice melting into water.
What is the kindof the change represented by grinding chalk into a powder?
A physical change.
What has the larger surface area a lump of chalk or chalk powder?
Chalk powder has a larger surface area compared to a lump of chalk. This is because the process of grinding chalk into powder increases the total surface area exposed to the surrounding environment. As a result, the smaller particles of chalk powder provide more surface area for reactions, interactions, or absorption than a single lump of chalk.
What is chalk powder?
Chalk powder is a fine powder made from crushing and grinding natural chalk into a soft, white substance. It is commonly used in various applications, such as in classrooms for writing on chalkboards, in sports for marking playing fields, and in recreational activities like rock climbing.
What is the process of making classroom chalk?
The process of making classroom chalk typically involves grinding natural chalk or calcium carbonate into a fine powder. This powder is then mixed with water and other additives, such as binders, to create a paste. The paste is shaped into sticks or other forms and allowed to dry, hardening into solid chalk. Finally, the chalk is packaged for distribution to schools and classrooms.
Can chalk be recycled and how?
Yes, chalk can be recycled by grinding it into a fine powder and mixing it with water to create a paste. This paste can then be molded into new chalk sticks and allowed to dry. Alternatively, chalk residue can be collected and used in other applications such as creating concrete or as a soil amendment for gardening.
What has more friction polished wood or chalk powder or marble?
Chalk powder
How do you separate a mixture of ammonium chloride and chalk powder in the laboratory?
Oh, dude, separating ammonium chloride and chalk powder? Easy peasy. So, you just gotta add water to the mixture, 'cause ammonium chloride dissolves in water while chalk powder doesn't. Then you can filter out the chalk powder 'cause it won't dissolve, leaving you with the ammonium chloride solution. Like, science, man.
Which acid or base is present in chalk powder?
Chalk is neutral.
Can filter paper separate chalk powder?
No, filter paper is not suitable for separating chalk powder. Chalk powder is insoluble in water, so it will not pass through the filter paper when mixed with water. To separate chalk powder from water, you can use techniques like sedimentation or decantation.
Is breaking a lump of chalk to make powder a chemical reaction?
Breaking a lump of chalk into powder is a physical change, not a chemical reaction. The chemical composition of the chalk remains the same before and after breaking it into powder.
By which process can you separate a mixture of naphthalene and chalk powder?
Sublimation can be used to separate naphthalene from chalk powder. Naphthalene sublimes at room temperature, while chalk powder does not, allowing for the separation based on this difference in physical properties.
