Law of conservation of mass?

Faviola Dewire: nagche-chem 1 ka ngayong summer no?? haha.

Jinny Dronen: Yes you are right. Actually the burning of sugar is an oxidation reaction and the products formed are CO2 and H2O vapours, both of which are in gaseous form and escapes the cruicible. No this is not contradictory to Law of mass conservation. If one can collect (as in combustion chamber) the products (CO2 and H2O) and weight their masses, it will be evident that the total mass of reactants i.e. sugar and also Oxygen of air used in combustion, is conserved. The only thing is that both the chemical and physical nature of the matter has changed in the reaction but the overall mass or weight of the mass is conserved...Show more

Brian Marquina: when sugar is burned, the atoms melt which is why theres nothing left. its pretty simple

Lucille Saetteurn: Pure sugars are made up of C, H and O. For example sucrose is C12H22O11, while glucose is C6H12O6.If a complete combustion is done -that is! the carbon completely reacts with oxygen to form the lowest energy molecule of C+O then it will form CO2. H will form H2O. So in a complete combustion, you would get nothing remaining, as the sugar will turn to CO2 and H2O. CO2 is already a gas at room temperature. H2O will be in the form of water vapor.The law of conservation of mass is preserved because the mass of CO2 and H2O produced will equal the mass of the starting sugar....Show more