The mass of the paper will decrease as it burns due to the conversion of paper into gases, soot, and ash. The total mass of the system (paper + jar) will remain the same, as the mass of the ashes, gases, and soot will equal the original mass of the paper.
The mass of the dust formed on burning a piece of paper is likely to be less than the original mass of the paper. This is because burning paper results in a conversion of some of the paper's mass into gases and ash, which can float away. The remaining dust would likely be a small fraction of the original mass.
because burning of paper is a chemical change while tearing of paper is a physical change
An example of conservation of mass is simply cutting up a cookie into pieces. Even though you now have more pieces, it still has the same amount of mass (how much matter is made of the cookie) as you did when it was all in one piece. :)
Burning is a chemical process, not a property.
Tearing the paper - cannot be reversed. Once torn - the paper can never be identical to the original. Burning paper - changes the bonds of the paper molecules.
The mass of the dust formed on burning a piece of paper is likely to be less than the original mass of the paper. This is because burning paper results in a conversion of some of the paper's mass into gases and ash, which can float away. The remaining dust would likely be a small fraction of the original mass.
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is simply rearranged. An experiment to demonstrate this is burning a piece of paper: the mass of the paper before burning will be the same as the mass of the ashes, smoke, and gases produced after burning. This experiment confirms that the total mass before and after the reaction remains constant.
Weigh an empty non-flammable closed box and record its mass. Put a piece of paper with a large enough mass to be detected inside the closed box. Weigh the closed box with the paper inside it and record its mass. How do we -{Light the paper on fire inside the closed box and wait until the paper is fully burned}? Weigh the closed box with burned paper inside it and record its mass. Subtract the box with ashes weight from the box with paper weight, and analyze the result(s).
the paper will end up running out
No, mass is not conserved when burning paper turns into ashes. The paper undergoes a chemical reaction with oxygen in the air, resulting in the release of carbon dioxide and water vapor. Some of the mass is lost as gases escape into the atmosphere.
because burning of paper is a chemical change while tearing of paper is a physical change
An example of conservation of mass is simply cutting up a cookie into pieces. Even though you now have more pieces, it still has the same amount of mass (how much matter is made of the cookie) as you did when it was all in one piece. :)
The reactants during burning paper are oxygen and the paper itself, which is mainly composed of cellulose. The products of burning paper are carbon dioxide, water vapor, ash, and some other combustion byproducts.
Burning cotton will smell like burning paper because both cotton and paper come from plants and burning wool smells like burning hair because both wool and hair comes from animals.
Burning is a chemical process, not a property.
Burning is an oxydation reaction.
Tearing the paper - cannot be reversed. Once torn - the paper can never be identical to the original. Burning paper - changes the bonds of the paper molecules.