Conservation of Mass: An Inquiry

, Illustrates conservation of mass through a series of demonstrations involving the process of freezing, dissolving, and heating. Shows that the conservation law holds by explaining that the mass lost during a chemical reaction is equal to the amount of gas discharged by that reaction. Concludes that mass, except that which is converted to energy, cannot be created or destroyed., Explores the properties of mass, showing that a physical change does not mean a change in mass and that the loss of mass in a chemical reaction is equal to the mass of gas that is discharged due to the reaction. Concludes that mass, except for that which , Water expands when it freezes, but there is no change in mass although the volume changes. Some mass is lost when there is a chemical reaction between hydrochloric acid and calcium carbonate, but this loss is shown to be equal to the mass of the gas that is discharged due to the reaction. Leads students to conclude that mass, except for that mass which is converted to energy, cannot be created or destroyed.NOTE: Two (or more) records have been merged together to create this data.