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  2. Boiling - Wikipedia

    en.wikipedia.org/wiki/Boiling

    Boiling is the method of cooking food in boiling water or other water-based liquids such as stock or milk. [13] Simmering is gentle boiling, while in poaching the cooking liquid moves but scarcely bubbles. [14] The boiling point of water is typically considered to be 100 °C (212 °F; 373 K), especially at sea level.

  3. Chemical energy - Wikipedia

    en.wikipedia.org/wiki/Chemical_energy

    Chemical energy is the energy of chemical substances that is released when the substances undergo a chemical reaction and transform into other substances. Some examples of storage media of chemical energy include batteries, [1] food, and gasoline (as well as oxygen gas, which is of high chemical energy due to its relatively weak double bond [2] and indispensable for chemical-energy release in ...

  4. Food energy - Wikipedia

    en.wikipedia.org/wiki/Food_energy

    Food energy is chemical energy that animals (including humans) derive from their food to sustain their metabolism, including their muscular activity. [ 1 ] Most animals derive most of their energy from aerobic respiration , namely combining the carbohydrates , fats , and proteins with oxygen from air or dissolved in water . [ 2 ]

  5. Thermochemistry - Wikipedia

    en.wikipedia.org/wiki/Thermochemistry

    Thermochemistry is the study of the heat energy which is associated with chemical reactions and/or phase changes such as melting and boiling. A reaction may release or absorb energy, and a phase change may do the same. Thermochemistry focuses on the energy exchange between a system and its surroundings in the form of heat. Thermochemistry is ...

  6. Heat of combustion - Wikipedia

    en.wikipedia.org/wiki/Heat_of_combustion

    The heating value (or energy value or calorific value) of a substance, usually a fuel or food (see food energy), is the amount of heat released during the combustion of a specified amount of it. The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions.

  7. Vacuum evaporation - Wikipedia

    en.wikipedia.org/wiki/Vacuum_evaporation

    When the process is applied to food and the water is evaporated and removed, the food can be stored for long periods without spoiling. It is also used when boiling a substance at normal temperatures would chemically change the consistency of the product, such as egg whites coagulating when attempting to dehydrate the albumen into a powder.

  8. Flameless ration heater - Wikipedia

    en.wikipedia.org/wiki/Flameless_ration_heater

    The heater is a plastic bag filled with magnesium and iron powders and table salt. When a meal pouch is placed in the bag and water is added, an exothermic reaction occurs which rapidly boils the water to heat the food. The U.S. Army began research into a chemical method to heating meals in 1973. The FRH was first issued in May 1990, and an FRH ...

  9. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    Water also plays many critical roles within the field of food science. Solutes such as salts and sugars found in water affect the physical properties of water. The boiling and freezing points of water are affected by solutes, as well as air pressure, which is in turn affected by altitude. Water boils at lower temperatures with the lower air ...

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