OCR Gateway Chemistry controlled assessment research

961 WordsFeb 23, 20154 Pages
Source 1 Hotbox Food would like to present a line of delicious beverages in completely self heating cans. Thanks to these innovative containers called “Hotshots”, it is now possible to drink high quality beverages at any time and at any place. Neither an external heat source, nor any other cooking utensils are required. Drinks 2go recipes do not contain additives, preservatives, artificial colorings or any raw materials obtained from GMO (Genetically Modified Organisms). Source 2 In one version, the inner chamber holds the food or drink, and the outer chamber houses chemicals that undergo an exothermic reaction when combined. When the user wants to heat the contents of the can, a ring on the can is pulled to break the barrier…show more content…
The can is manufactured as three containers. A container for the beverage surrounds a container of the heating agent separated from a container of water by a thin breakable membrane. When the user pushes on the bottom of the can, a rod pierces the membrane, allowing the water and heating agent to mix. The resulting reaction releases heat thus warms the beverage surrounding it. Source 6 Exothermic reactions transfer energy to the surroundings. The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. The temperature increase can be detected using a thermometer. Some examples of exothermic reactions are: • Combustion (burning) • Many oxidation reactions, for example rusting • Neutralisation reactions between acids and alkalis When a flame burns it transfers heat to its surroundings. Exothermic reactions can be used for everyday purposes. For example, hand warmers and self-heating cans for drinks (such as coffee) use exothermic reactions. Data about how hot the food and drink can get, including the energy released per gram in these chemical reactions Source 7 When activated, the water and calcium oxide mix, causing an exothermic reaction that heats the beverage by a total of 50 to 55 degrees Celsius in about three minutes. This means that a drink which starts out at room temperature (20ºC/68ºF) heats up to 70ºC (158ºF) – from a cold cup of mud

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