why a self heating can can only be used once
Answers
Answer:
Self-heating food packaging is active packaging with the ability to heat food contents without external heat sources or power. Packets typically use an exothermic chemical reaction. Packets can also be self-cooling. These packages are useful for military operations, during natural disasters, or whenever conventional cooking is not available. These packages are often used to prepare main courses such as meat dishes, which are more palatable when hot.
Explanation:
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Answer:
The self-heating can only be used once because the metal in the bottom of the can is coated with a heat-sensitive material that reacts when it comes into contact with food or drink. The reaction starts a chemical process known as oxidation, which causes the metal to disintegrate and turn into rust.