![]() Since 1958, scientist Charles Keeling and others have measured the amount of carbon dioxide in Hawaii's atmosphere. Carbon dioxide levels in our atmosphere have thus risen about 40% since the start of the Industrial Revolution, which is raising global temperature. Before industrial activity, there was around 270 ppm in the atmosphere. Today it has a concentration of over 400 ppm (parts per million) in the atmosphere. However, an increase in CO 2 concentrations in our atmosphere is causing average global temperatures to rise, disrupting other aspects of Earth's climate.Ĭarbon dioxide is the fourth most abundant component of dry air. ![]() Without it, our planet would be inhospitably cold. A molecule of carbon dioxide (CO 2) is made up of one carbon atom and two oxygen atoms.Ĭarbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. ![]() Although much less abundant than nitrogen and oxygen in Earth's atmosphere, carbon dioxide is an important constituent of our planet's air. In the colored models, carbon is light gray and oxygen is red.Ĭarbon dioxide is a colorless and non-flammable gas at normal temperature and pressure. It is not flammable.Four representations chemists use for carbon dioxide. It can cause unconsciousness at high concentration. Health effects / safety hazards: Carbon dioxide inhalation can cause headache and increase of the respiration rate. It is present in sodas and soda water and dry ice. It is used as a food additive and also as a propellant. Other products are the carbonate salts as sodium carbonate and bicarbonate (baking soda). Some of these products are the urea, used as fertilizer and the solvent and chemical precursor methanol. Uses: Carbon dioxide is used in the productions of other most valuable products in the chemical industry. When the carbon dioxide is in contact with water, it forms carbonic acid, which could decrease the pH of water, causing a problem for aquatic life. Even when the solubility is low, this factor is very important for the water bodies in the planet. Carbon dioxide solubility in water is 1.45 g/L, and it is insoluble in ethanol and organic solvents.Ĭhemical properties: One of the most important reactions for the environment is the solubility of carbon dioxide in water. Carbon dioxide melting point is -56.6 ☌ and above this temperature, it sublimates. When concentrate, it can have a acidic odour. Physical properties: Carbon dioxide is a colourless and odourless gas. In a unnatural way, carbon dioxide can be produced from the combustion of fuels as methane, gasoline, kerosene, propane, minerals, rocks and coal. The carbon dioxide produced is used for the plants during the photosynthesis in a reverse process that produces oxygen. In the natural way, the carbon dioxide is produced during the respiration of organisms (plants, animals, fungi, bacteria):Ĭ 6H 12O 6 (s) + 6 O 2 (g) → 6 CO 2 (g) + 6 H 2O (l) + heat Preparation: Carbon dioxide is produced by the natural and unnatural ways. Carbon dioxide is found in the atmosphere and is also emitted by volcanoes, natural gas, crude oil and hot springs. All forms of live need respiration to survive, in this process the organisms inhale or capture oxygen from the environment and through different biochemical reactions it is produced CO 2 and water. It is the product of the respiration process. Occurrence: Carbon dioxide is largely found in nature. Its chemical structure can be written as below, in the common representations used for organic molecules. The two anions are bound to the carbon cation trough double bonds (pi bonds) making the carbon dioxide as a linear and rigid molecular. The molecule is formed by one carbon cation C 4+ and two oxygen anions O 2. ![]() Formula and structure: The carbon dioxide chemical formula is CO 2.
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