Why is a closed system required for conservation of mass to be observed in a chemical reaction?
a closed system can exchange both energy and matter with its surroundings
a closed system can exchange energy with its surroundings but not matter
a closed system cannot exchange energy or matter with its surroundings
the statement is false, you can check conservation of mass using an open system
The correct answer is: a closed system cannot exchange energy or matter with its surroundings. This is because if the system is open and matter is able to enter or leave the system, then the conservation of mass cannot be observed as the amount of matter in the system can change. In a closed system, however, the amount of matter remains constant, allowing for the observation of conservation of mass.
The correct answer is: a closed system cannot exchange energy or matter with its surroundings.
In a closed system, no matter can enter or leave the system, and no energy can be transferred to or from the system. This is important for the observation of the conservation of mass in a chemical reaction. If matter could enter or leave the system, the total mass of the system would change, and conservation of mass would not be observed. Therefore, a closed system is required to ensure that the mass remains constant and that the law of conservation of mass is upheld in a chemical reaction.