When a match burns it's mass decreases. Is this a violation of the law of conservation of mass?

Chemistry · College · Thu Feb 04 2021

Answered on

 When a match burns and its mass appears to decrease, it is not actually a violation of the law of conservation of mass. This law states that mass cannot be created or destroyed in an isolated system. During the burning of a match, a chemical reaction occurs, specifically combustion, which transforms the substances in the match head and the wooden part into new substances. The compounds in the match react with oxygen in the air to produce gases like carbon dioxide and water vapor, as well as ashes. The gases escape into the air, which is why we cannot see or weigh them as part of the match's original mass anymore. However, if we were to capture all of the gases, ashes, and particles released during the burning process, and added their masses to the remaining part of the match, the total mass would remain constant, thus upholding the law of conservation of mass.