Cincinnati Form Fraklin's Flask
Demonstrate Boiling At A Reduced Temperature and Pressure
Intially, this specially desighed 1-liter 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 stooper fitted with a thermometer and invert the flask. Place ice in the special concave bottom. As you do so, the thermometer clearly shows the temperature is failing, but the water will boil until it is only 15° or 20° above room temperature. Includes rubber stopper with hole and thermometer. Requires Iron Support Ring with Clamp, 11.7cm I.D. ,not included.
法蘭克林燒杯
這一個特別設計的一公升容量的細口頸瓶應裝一些水並朝上放置。倒
入一些沸騰水至瓶中後,用一附有溫度計的橡皮篩篩住瓶口,將瓶倒立。
在瓶上凹口放入冰塊,你會發現溫度計上的溫度迅速下降,但一直下降
到比室溫高15-20度時,水仍是沸騰的。附有橡皮篩及溫度計。需自備
一可放瓶子的支架。