Franklin's Flask

• Demonstrate Boiling at a Reduced Temperature and Pressure. Initially, the flask should be in a normal upright position and partially filled with water. After bringing the water to a boil, close off the neck with a rubber stopper fitted with a thermometer and invert the flask. Place ice in the concave bottom. Water should start to boil again, and continue to boil until it is only 15° or 20° above room temperature.
• Located in L02, section C3.