Sulfur Daily Question: March 10, 2016. Participating earns 3 wealth points, while better answers yield 8 to 15 wealth points.

This post was last edited by Sulfur-Zinc-Aluminum on 2016-3-19 08:57. Sulfur: It appears as pale yellow, brittle crystals or powder, and has a distinctive odor. The molecular weight is 32.06, the vapor pressure is 0.13 kPa, the flash point is 207°C, the melting point is 119°C, the boiling point is 444.6°C, and the relative density (water = 1) is 2.0. Sulfur is insoluble in water, slightly soluble in ethanol and ether, and readily soluble in carbon disulfide. As a flammable solid, sulfur is mainly used in the production of sulfuric acid, dyes, pesticides, matches, **, rubber, rayon, and other products.

Bulk sulfur appears as light yellow blocky crystals, while its powder is light yellow in color and has a distinctive odor. It is soluble in carbon disulfide but insoluble in water. The specific gravity, melting point, and solubility in carbon disulfide vary depending on the crystal form. Its boiling point is approximately 445°C. Sulfur burns in air, producing a blue flame and sulfur dioxide; the powder can catch fire easily when mixed with air or oxidizing agents, and may even explode.

This post was last edited by Sulfur-Zinc-Aluminum on 2016-3-19 08:57. Bulk sulfur appears as light yellow blocky crystals, while its powder is light yellow in color and has a distinctive odor; it is soluble in carbon disulfide but not in water. The specific gravity, melting point, and solubility in carbon disulfide vary depending on the crystal form. The boiling point is approximately 445°C. Sulfur burns when exposed to air, producing a blue flame and sulfur dioxide; the powder can ignite or even explode when mixed with air or oxidizing agents. Specific gravity: 2.07 at 20°C (68°F); Melting point: 115°C (239°F). Vapor density (air = 1): 8.9

Bulk sulfur appears as light yellow blocky crystals, while its powder is light yellow in color and has a distinctive odor. It is soluble in carbon disulfide but insoluble in water. The specific gravity, melting point, and solubility in carbon disulfide vary depending on the crystal form. Its boiling point is approximately 445°C. Sulfur burns in air, producing a blue flame and sulfur dioxide; the powder can catch fire easily when mixed with air or oxidizing agents, and may even explode.

Sulfur appears as pale yellow, brittle crystals or powder with a distinctive odor; its molecular weight is 32.06. The vapor pressure is 0.13 kPa, the flash point is 207°C, the melting point is 119°C, and the boiling point is 444.6°C. Its relative density (with water = 1) is 2.0. Sulfur is insoluble in water, slightly soluble in ethanol and ether, and readily soluble in carbon disulfide

What are the physical and chemical properties of sulfur? At least five points. Answer: Sulfur is soluble in carbon disulfide, insoluble in water, and has a distinctive odor. The specific gravity, melting point, and solubility in carbon disulfide vary depending on the crystal form. The boiling point is approximately 445°C. Sulfur burns in air, producing a blue flame and sulfur dioxide as a byproduct; the powder can ignite easily when mixed with air or oxidizers, and may even explode.

Answer: Sulfur is elemental sulfur; solid sulfur appears as light yellow crystalline masses, while its powder form is light yellow in color. It has a distinctive odor, is soluble in carbon disulfide, but insoluble in water. Industrial sulfur is yellow or pale yellow, and appears in forms such as lumps, powder, granules, or flakes. There are various allotropes; rhombic sulfur, also known as diamond sulfur or α-sulfur, is the most stable at temperatures below 95.5°C. It has a density of 2.1 g/cm3, a melting point of 112.8°C, and a boiling point of 445°C. It is brittle and does not conduct heat or electricity well ； Monoclinic sulfur, also known as β-sulfur, is stable at temperatures above 95.5°, with a density of 1.96 g/cm3 ； Elastic sulfur, also known as γ-sulfur, is amorphous and unstable, prone to transforming into α-sulfur. Both orthorhombic sulfur and monoclinic sulfur are composed of S8 ring molecules; in the liquid state they consist of chain-like molecules. In the vapor phase, there are S8, S4, S2, and other molecules, while above 1000°C the vapor is composed of S2 molecules. Sulfur has relatively reactive chemical properties; it can combine with most elements such as oxygen, hydrogen, halogens (except iodine), and metals to form ionic or covalent compounds. Elemental sulfur has both oxidizing and reducing properties. For example, when sulfur is heated together with iron, it forms ferrous sulfide; when heated with carbon, it produces carbon disulfide; at room temperature it reacts with fluorine to form sulfur hexafluoride; and when heated it reacts with chlorine to form S2Cl2. Sulfur is mainly used in industry to produce sulfuric acid, vulcanized rubber, matches, sulfides, and other products. It is used as an insecticide in agriculture, such as in lime sulfur mixtures, and is also used in medicine, such as in sulfur ointments. Sulfur exists in nature in free form and in combined forms, with the combined forms being mainly sulfides and sulfates. Its abundance in the Earth's crust is 0.048%.

Sulfur has a distinctive smell. The vapor pressure is 0.13 kPa, the melting point is 119°C, and the relative density is 2.0. Sulfur is insoluble in water, slightly soluble in ethanol and ether, and readily soluble in carbon disulfide; it is an excellent insulator for electricity and heat. Specific gravity: 2.07 at 20°C (68°F). Melting point: 115°C (239°F). Vapor density (air = 1): 8.9. Vapor pressure (mm Hg): 10 at 246°C (475°F). Dust can form flammable or explosive gas mixtures; long-term exposure can cause irritation to the eyes, skin, and respiratory tract. Health rating: 1 – Mild (minimal impact on daily life). Flammability level: 3 – Severe (highly flammable). Storage color code: Red (highly flammable).

Bulk sulfur appears as light yellow chunky crystals, while its powder is light yellow in color; it has a distinctive odor, is soluble in carbon disulfide, but insoluble in water. The specific gravity, melting point, and solubility in carbon disulfide vary depending on the crystal form. The boiling point is approximately 445°C. Sulfur burns in air, producing a blue flame and sulfur dioxide as a byproduct; the powder can ignite easily when mixed with air or oxidizers, and may even explode. 　　Sulfur blocks exist in three crystal forms: orthorhombic sulfur, monoclinic sulfur, and amorphous sulfur, among which orthorhombic sulfur is the most stable; most commercial products consist of two of these crystal forms.

The element symbol is S, with an atomic number of 16 and an atomic weight of 32.06. Its outer electron configuration is 3S23p4; it belongs to group VIA in the third period. Its main oxidation states are -2, 0, +2, +4, and +6. The atomic covalent radius is 104 picometers, the ionic radii are 2184 picometers for S-, and 630 picometers for S+. The first ionization energy is 1000 kJ/mol, and the electronegativity is 2.5. Elemental sulfur, commonly known as sulfur, appears as pale yellow crystalline masses in solid form, and as a pale yellow powder. It has a distinctive odor, is soluble in carbon disulfide, but insoluble in water. Industrial sulfur is yellow or pale yellow, and appears in forms such as lumps, powder, granules, or flakes. There are various allotropes; rhombic sulfur, also known as diamond sulfur or α-sulfur, is the most stable at temperatures below 95.5°C. It has a density of 2.1 g/cm3, a melting point of 112.8°C, and a boiling point of 445°C. It is brittle and does not conduct heat or electricity well ； Monoclinic sulfur, also known as β-sulfur, is stable at temperatures above 95.5°, with a density of 1.96 g/cm3 ； Elastic sulfur, also known as γ-sulfur, is amorphous and unstable, prone to transforming into α-sulfur. Both orthorhombic sulfur and monoclinic sulfur are composed of S8 ring molecules; in the liquid state they consist of chain-like molecules. In the vapor phase, there are S8, S4, S2, and other molecules, while above 1000°C the vapor is composed of S2 molecules. It has relatively reactive chemical properties and can combine with most elements such as oxygen, hydrogen, halogens (except iodine), and metals to form ionic or covalent compounds. Elemental sulfur has both oxidizing and reducing properties. For example, when sulfur is heated together with iron, it forms ferrous sulfide; when heated with carbon, it produces carbon disulfide; at room temperature it reacts with fluorine to form sulfur hexafluoride; and when heated it reacts with chlorine to form S2Cl2. Sulfur is mainly used in industry to produce sulfuric acid, vulcanized rubber, gunpowder, matches, sulfides, and more. It is used as an insecticide in agriculture, such as in lime sulfur mixtures, and is also used in medicine, such as in sulfur ointments. Ancient people were already aware of natural sulfur. Sulfur exists in nature in free form and in combined forms, with the combined forms being mainly sulfides and sulfates. Its abundance in the Earth's crust is 0.048%. It is obtained from natural sulfur ores, or by burning pyrite and coke in limited air*. Sulfur burns in air, producing a blue flame and sulfur dioxide; when mixed with air or oxidizers, the powder can catch fire or even explode.