i have to do this spring break packet that my science teacher gave me. and one of the questions given was "Is burning and melting the same property of matter?" sooooo, is it?
i think it is, but i would like to make sure im correct so that i dont have the question be marked as wrong. THNX!!!!!!!!!!!1 and please answer as fast as you can. thank- you!
i think it is, but i would like to make sure im correct so that i dont have the question be marked as wrong. THNX!!!!!!!!!!!1 and please answer as fast as you can. thank- you!
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It is not. Melting is a physical change, where a solid changes to a liquid. Burning (also called combustion) is a chemical reaction, where a substance reacts with gases (most often oxygen, but some metals react with other gases as well) and releases energy.
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No. Melting is a Physical change, and Burning is a Chemical Change.
Physical change: A change in form of a substance without a change in its identity. A substance may change in phase (solid, liquid, or gas), or it may change in some other physical property, but its chemical composition does not change.
Examples:
Boiling of water (liquid water, ice and steam are just the liquid, solid and gas forms of H2O)
Freezing of water to form ice
Chewing of food
Sharpening of a pencil
Crystallization of sugar from a sugar solution
*Melting of gold*
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Chemical Change: A change in the identity or chemical makeup of a substance. A change that involves a rearrangement of the way atoms are bonded is a chemical change.
Examples:
***Combustibility = The ability to react with oxygen (e.g., burning a candle or a match, burning of fuel). Methane reacts with oxygen to form carbon dioxide and water**
Digestion of food
Electrolysis of water (breaking water up into hydrogen and oxygen)
Reactivity = The ability to be changed chemically because of a reaction with another chemical substance, such as the development of a gas (e.g., from the reaction of vinegar and baking soda)
Formation of a precipitate (e.g., silver nitrate and salt water, or cooling a solution of sodium nitrate and water) - see p. 492-494
Change in color (such as burning toast, or reaction of chlorox bleaching colored cloth, or cooking of an egg)
Oxidation (or rusting) of steel wool in water
Physical change: A change in form of a substance without a change in its identity. A substance may change in phase (solid, liquid, or gas), or it may change in some other physical property, but its chemical composition does not change.
Examples:
Boiling of water (liquid water, ice and steam are just the liquid, solid and gas forms of H2O)
Freezing of water to form ice
Chewing of food
Sharpening of a pencil
Crystallization of sugar from a sugar solution
*Melting of gold*
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chemical Change: A change in the identity or chemical makeup of a substance. A change that involves a rearrangement of the way atoms are bonded is a chemical change.
Examples:
***Combustibility = The ability to react with oxygen (e.g., burning a candle or a match, burning of fuel). Methane reacts with oxygen to form carbon dioxide and water**
Digestion of food
Electrolysis of water (breaking water up into hydrogen and oxygen)
Reactivity = The ability to be changed chemically because of a reaction with another chemical substance, such as the development of a gas (e.g., from the reaction of vinegar and baking soda)
Formation of a precipitate (e.g., silver nitrate and salt water, or cooling a solution of sodium nitrate and water) - see p. 492-494
Change in color (such as burning toast, or reaction of chlorox bleaching colored cloth, or cooking of an egg)
Oxidation (or rusting) of steel wool in water
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No. Burning is combustion, which results in conversion of the matter to carbon dioxide, water, possibly some other byproducts, and generation of heat. IOW, it's a chemical change, a conversion from one partiuclar molecular formula to another. In the sense that it is converted to CO2 and H2O, the starting moleculde is "destroyed." In contrast, melting is a simply a change of state (physical form), from solid to liquid--chemically, the matter remains intact, i.e. its molecular formula remains the same, but intra- and intermolecular distances and bond angles are altered.