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How is the melting of an ice cube similar to the grinding of chalk into a powder?
Wiki User
∙ 16y ago
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.
Wiki User
∙ 16y ago
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What happens to chalk powder if it is added to oil does it float or sink and why?
chalk powder floats.since it's density is less compared to oil"s.
Where does chalk com from?
chalk comes from chalk deposits the white cliffs of dover is one then the grind it into powder then they press it into molds of chalk then they sell it
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?
by the process of SUBLIMATION.....
Can filter paper separate chalk powder?
yes
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 more friction polished wood or chalk powder or marble?
Chalk powder
Which acid or base is present in chalk powder?
Chalk is neutral.
What is grind teeth together?
When you grind your teeth it will sound similar to a person rubbing chalk on a chalkboard. Not a screeching sound, but a grinding, smoothing sound. It can damage your teeth.
What happens to chalk powder if it is added to oil does it float or sink and why?
chalk powder floats.since it's density is less compared to oil"s.
What metal is in chalk?
There are no metals in chalk because it is a non metal. It is also a powder
Where does chalk com from?
chalk comes from chalk deposits the white cliffs of dover is one then the grind it into powder then they press it into molds of chalk then they sell it
Is chalk powder is soluble in water?
ye
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?
by the process of SUBLIMATION.....
What is the powder gymnast put on called?
It is called chalk.
