Respiration, Combustion And Photosynthesis

Respiration: Respiration is the chemical reaction in which energy is released from a reaction between Oxygen (O2) and Glucose (C6H12O6) Respiration releases energy for cells from glucose. This can be aerobic respiration, which needs oxygen, or anaerobic respiration, which does not. During exercise, the breathing rate and heart rate increase. During hard exercise an oxygen debt may build up. The word equation for respiration is: Glucose + Oxygen = Carbon Dioxide and Water The chemical equation is C6H1206 + O2 = CO2 + H20 Respiration is used by all living humans and animals, to make energy for movement, heat and to keep vital organs running, without it we'd be dead.

Combustion (a.k.a burning) Combustion is essentially burning, fuels react with oxygen to release energy. Complete combustion happens in a plentiful supply of air. Incomplete combustion occurs when the supply of air is limited. Complete combustion releases more energy than incomplete combustion. Incomplete combustion also creates carbon monoxide, and more soot. Several factors must be considered when choosing the best fuel for a particular purpose. Hydrocarbon fuels are fuels made of entirely hydrogen and carbon, such as methane or propane, 2 flammable gases.