Science Assessment ~ Topics ~ Substances, Chemical Reactions, and Conservation of Matter ~ Misconception SCM029

Mass is not conserved during processes in which gases take part (Mas et al., 1987; Berkheimer et al., 1988; Hesse et al., 1992). If a gas is produced during a chemical reaction that takes place in a closed system, the total mass decreases (Ozmen et al., 2003).

Items that test for misconception SCM029 in this project (THSB) and key idea ()
Item ID Number	Item Description	How Often the Misconception was Chosen	Select This Item for My Item Bank
SB066001	Two liquids undergo a chemical reaction in an open jar and bubbles form. The mass of the liquids is less after the reaction because a gas was produced and that gas left the system.	15%