Question

What is carbon dioxide??​

Answer 1

Explanation:

Carbon dioxide is an acidic colorless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas.

Answer 2

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Carbon dioxide Definition:-

One carbon atom and two oxygen atoms make up carbon dioxide, a chemical compound. The formula CO2 is often used to refer to it.

Carbon dioxide is a chemical element that can be found in the atmosphere. At room temperature, it is a gas. It has one carbon atom and two oxygen atoms. When people and animals exhale, carbon dioxide is released. It is a greenhouse gas that is found in low concentrations in the Earth’s atmosphere. Dry ice is what it is when it is firm.

Human activities contribute carbon dioxide to the atmosphere. Carbon dioxide is emitted when hydrocarbon fuels (such as wood, coal, natural gas, gasoline, and oil) are burned. Carbon from fossil fuels reacts with oxygen in the air to form carbon dioxide and water vapour during combustion or burning.

Properties of Carbon dioxide:-

Carbon dioxide is a gas that is both colourless and odourless. Water, ethanol, and acetone are all soluble in it.

Some general properties of carbon dioxide are given below:-

Molecular formula:-

• CO2

Molar mass:-

• 44.0095(14) g/mol

Density:-

• 1,600 g/L – solid
• 771 g/L – liquid
• 1.98 g/L – gas

Melting point:-

• 56.6 °C

Boiling point:-

• 78.5 °C

Specific gravity:-

• 1.53 at 21oC

Synonyms:-

• Carbonic anhydride
• Dry ice
• Carbonic acid gas

Henry constant for solubility:-

• 298.15 mol/ kg * bar

Water solubility:-

• 0.9 vol/vol at 20oC

Chemical Properties of Carbon dioxide:-

According to the following reaction, carbon dioxide dissolves slightly in water to form a weak acid called carbonic acid, H2CO3:-

CO2 + H2O → H2CO3

The hydronium cation, H3O+, and the bicarbonate ion, HCO3–, are formed after carbonic acid reacts slightly and reversibly in water, as follows:

H2CO3 + H2O → HCO3– + H3O+

Plants take in carbon dioxide (CO2) and water (H2O) from the air and soil during photosynthesis. Water is oxidized in the plant cell, which means it loses electrons, while carbon dioxide is reduced, which means it gains electrons. Water is converted to oxygen, and carbon dioxide is converted to glucose. The plant then releases the oxygen into the atmosphere while storing energy in the glucose molecules.

The mechanism by which green plants and other organisms convert light energy into chemical energy is known as photosynthesis. Light energy is absorbed and used by green plants during photosynthesis to turn water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.