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Answer: An open system can exchange both matter and energy with the surroundings. Î´ H is measured when an open system is used as a calorimeter. A closed system has a fixed amount of matter, but it can exchange energy with the surroundings.
CHEMISTRY LAB EQUIPMENT Basic Use Piece of Equipment Basic Use Piece of Equipment Used to make accurate measurements of liquid volumes. The bumper ring on larger cylinders is to prevent breakage if tipped over. Keep it near the top. Graduated cylinder The Erlenmeyer flask is the most common flask in the CHS chemistry lab.