Question

2. The largest container on popcorn on record was 106 m3. There is water vapor (a gas) inside popcorn kernels. Why does adding heat pop the kernel into corn?

Answer 1

The kernel of popcorn contains some amount of water in the form of gas. As the temperature inside a container inside the container increases, the water starts to expand, and hence the pressure continues to increase inside the starch layer of the kernel. Finally, the kernel reaches a stage where the steam held up inside the kernel releases and pops into the corn.

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