DENJIRO: I have two balloons here. One is a rubber balloon, and the other is coated with aluminum. They are both floating since they are filled with helium, which is lighter than air. At first, they are both floating like this, but after a day, the rubber balloon... deflates like this. I’m sure you’ve experienced this before. This happens because the helium molecules are small and can go through the rubber. However, with balloons coated with aluminum, helium molecules cannot escape, and the balloon does not deflate. Balloons deflating due to helium gas escaping the balloon is due to a phenomenon known as “osmosis.”
Now, let’s perform an experiment on osmosis using carbon dioxide and limewater. This is a balloon inflated with carbon dioxide. I’m going to place it in this limewater.
BOY: It’s white around the balloon!
DENJIRO: Since carbon dioxide also passes through rubber, it reacted with the limewater. That’s why the limewater turned white.
What happens if we do the opposite? This time, I have limewater in a balloon. Let me put this in a container that is filled with carbon dioxide.
BOY: The inside of the balloon has turned white!
DENJIRO: The limewater inside the balloon has become cloudy. This means the carbon dioxide on the outside of the balloon went inside. Actually, carbon dioxide travels from a place of high concentration to low concentration, regardless of whether it’s inside or outside the balloon.
NARRATOR: Osmosis is involved with umeboshi pickled plums as well. With umeboshi, the water inside the plum is what moves. By pouring salt on the plum, the concentration of water becomes lower outside the plum. Since water moves from inside the plum, where there’s high concentration, to outside the plum, where there’s low concentration, you get an umeboshi pickle.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!
Негізгі бет Ойын-сауық Why a Balloon Deflates / Mr. Denjiro's Happy Energy!
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