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i'm talking about popcorn.

2007-07-02 08:10:56 · 3 answers · asked by Anonymous in Science & Mathematics Chemistry

3 answers

Ordinary corn does not have the same moisture content as pop corn. Pop corn pops because of the water inside the kernel. When it gets hot the moisture in the kernel boils and turns to a vapor. A vapor takes up 1000 times more space than the liquid it came from. The vapor creates pressure inside the kernel as the vapor expands. This pressure causes the kernel to swell then explode. The light, fluffy pop corn is caused by the small bubbles left by the vapor. Ordinary corn does not have enough moisture to pop. It also has a thicker husk around the kernel so it is harder to pop.

2007-07-02 08:15:43 · answer #1 · answered by physandchemteach 7 · 0 0

When corn is subjected to heat the moisture it has converts into vapor. When the pressure builds enough to burst out the corn pops. but in dry corn the moisture content is not that high so dry corn will not pop or maybe some of them might

2007-07-02 15:18:59 · answer #2 · answered by CrazyCoder 3 · 0 0

Pop corn has a special shaped kernal that seals at the bottom and seals in a droplet of water. When this is heated, it turns to steam and explodes(because it takes up more space as a gas) and we havae pop corn. Other dry corn has a bottom of kernal that is open, so no water gets sealed in.

2007-07-02 16:39:23 · answer #3 · answered by science teacher 7 · 0 0

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