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Solution: What observations did Lavoisier make? What law did he formul...

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What observations did Lavoisier make? What law did he formulate? 

Video Transcript

Hey guys, in this question they ask us what observations did Levassor make? And from these observations what law was he able to formulate? Now we're going to say here that Levassor came up with this observation he noticed that in a closed container total mass was constant meaning that in a chemical reaction remember your reactants undergo a reaction in order to become products, he observed that if you start out with for example 100 grams of reactant at the end you'll still have 100 grams of product the amount of material didn't change it stayed constant throughout the whole process, now here and this was in a closed container total mass was constant for combustion reaction so this was in terms of a combustion reaction. Now from this, Levassor was able to come up with the law of conservation of mass and remember the law of conservation of mass is that matter cannot be created nor destroyed all that happens is it changes forms so that's why if we began with 100 grams of reactant we'd end with 100 grams of product now, so remember a law is important because we make these observations and because of these observation we can predict future results for other reactions so that's the big contribution he came up with because he created this law he was able to predict that we begin with X amount and we should end with X amount and he could apply this to other reactions because it's a the law it could also apply to them so these are the observations and the law that he contributed to chemistry.