Is popcorn a chemical change/ reaction?

Question

Also, can you give me some chemical changes/reactions. Thanks! =]

Answer 1

Everytime you cook, Emy, you have created a chemical reaction. The heat speeds up a reaction between two things, or can just change the property of one thing, like the corn. A raw carrot and a cooked carrot taste completely different, because of the reactions that changed the property of the carrot. Heat can cause chemical bonds to break, which makes the molecule different than it was.

When you breathe Oxygen in, and Carbon Dioxide goes out of your lungs, it is due to a chemical reaction. When you eat, all the food you put in gets turned into good nutrients for your body via chemical reactions in your mouth, stomach, intestines, blood and liver.

Answer 2

Popcorn Reaction

Answer 3

Popcorn pops because the water in the kernel heats up and turns into steam. Its like a pressure cooker that got way to hot, and explodes. However, hot water vapor is still H20 just like it was in liquid or solid form.

A chemical reaction would be those burnt popcorn bits that are always on the bottom of the bag or sides of the kettle. That's carbohydrates in the corn reacting with oxygen and producing smoke, CO2, H20 vapor and carbon residue. Because the chemical formulas of the products aren't the same as the chemical formulas of the starting materials, its a true chemical reaction. Another example is burning methane, better known as natural gas:

CH4+2O2 -->CO2+2H20+heat energy

Or hydrochloric acid and sodium hydroxide:

HCl+NaOH-->NaCl+H2O

Answer 4

H2O + heat = Steam inside corn kernel (Pressure increase, gelatization of starches) = Popcorn (Rupture of hull, expansion due to pressure, cooling starches set into a crispy matrix)

Is it a chemical change or a reaction? Hmmm...
The primary change is a physical change.
However, starch gelatization is a chemical change.

From Wikipedia
How popcorn pops

As with all cereal grains, each kernel of popcorn contains a certain amount of moisture in its starchy endosperm. Unlike most other grains, the outer hull, or pericarp, of the popcorn kernel is both strong and impervious to moisture, and the starch inside consists almost entirely of a hard, dense type.[4]

As the kernel is heated past the boiling point, water in the kernel turns to superheated, pressurized steam, contained within the moisture-proof hull. Under these conditions, the starch inside the kernel gelatinizes, softening and becoming pliable. The pressure continues to increase until it reaches the breaking point of the hull: a pressure of about 135 psi, or 9.1 atmospheres.[4] The hull ruptures rapidly, causing a sudden drop in pressure inside the kernel and a corresponding rapid expansion of the steam, which expands the starch and proteins of the endosperm into an airy foam. As the foam rapidly cools, the starch and protein polymers set into the familiar crispy puff.[4]

Answer 5

A chemical change is a change that alters the chemical properties of a substance and can't be reversed. In the case of popcorn popping, the kernels pop into pieces of popped corn. You can't take that piece of popped corn and change it back to the original state of a kernel.

This means it's a chemical change.

Some examples of chemical changes/reactions are:
- Burning a piece of food on the stove.
- The explosion of a firework.
- Letting a piece of fruit rot in the sunlight

Answer 6

That's a good question! The answer is definitely not intuitive. I would say that it is a chemical change. It fits the most important criteria. It involves fire or oxidation, and it's irreversible. The fact that it's irreversible is a big sign to me that it's chemical. I've never heard of anyone unpopping popcorn. My guess is because you can't, it's a chemical change.

Answer 7

No it's the corn oil in the kernel boils,creates steam and pressure in the kernel and it pops.
An easy chemical reaction experiment is add one teaspoon of Vinegar to one teaspoon of baking soda. I you do this in a film container and put the lid on, and then stand the container upside down on it's lid the same thing that happens to pop corn will happen to the container. the pressure from the chemical reaction should launch the film container like a small missile. Like the steam pressure from the corn oil pops the kernel. You can use lesser equal amounts.it will be messy though so do it outside.

Answer 8

popcorn is a chemical change and a chemical reaction

Answer 9

In the superstore, fruits are usually picked out much too soon. Some are rocks, many are wrong. Some of the fruit and vegetables are generally right (zucchini, onions, garlic, lettuce, greens, and a few others) so I'd have to go with vegetables.