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SELF HEATING COFFEE

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on 18 September 2013

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Transcript of SELF HEATING COFFEE

SELF HEATING CANS
-SHREYA SINGH,6B

WHAT IS SELF HEATING CANS
Self Heating Can is a can in which the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined and heat the food or drink inside.
Exothermic Reaction
An exothermic reaction is a chemical or physical reaction that is done by the release of heat. It gives out energy to its surroundings. The energy needed for the reaction to occur is less than the total energy released.
EXAMPLES- Combustion reactions of fuels
Burning of a substance
Adding water to anhydrous copper(II) sulfate
Reactions taking place in a self-heating can based on lime and aluminium
Burning of natural gas
Decomposition of vegetable matter into compost
Advantages And Disadvantages Of Self Heating Cans
Self-heating cans offer benefits to campers and people without access to a microwave oven, stove or camp-fire, but the technology is not yet common. This is because self-heating cans are considerably more expensive than the conventional type, they have problems with uneven heating of their contents, and the heater takes up considerable package space
Packets typically use an exothermic chemical reaction. Other types of active packaging are self-cooling food packaging and radio-frequency identification . Packages like these are typically used by the military during operations when it is unsafe to have a fire to cook.Commercial heat sources for self-heating food packaging use an exothermic reaction between quicklime or calcium oxide, and water, which generates 60 calories of heat per gram.
THANK YOU
SELF HEATING CAN OF COFFEE
SELF HEATING CAN OF PASTA
VIDEOS
Video demonstrating Exothermic reaction
Video explaining and demonstrating
exothermic reaction
FACTS
Full transcript