【Daily Question】Chemical Engineering Principles 309: Properties of Hydrogen and Oxygen (January 29)
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This post was last edited by “Back to Cambridge” on February 5, 2016, at 17:06. Starting today, the Chemical Engineering Theory section is launching the “Question of the Day” activity, aimed at helping everyone reinforce their basic knowledge of chemical engineering. Subsequently, series such as “Fundamentals of Chemical Engineering”, “Mass Transfer and Separation”, “Chemical Thermodynamics”, and “Chemical Process Technology” will be introduced. We hope for your active participation! Wishing you all a Merry Christmas~~ For replies to the “Question of the Day” activity, answers can be viewed directly; however, the thread will be closed after one day! ! To encourage continued participation from everyone this year! Participation earns you 3 Wealth rewards; answering correctly adds an extra 4 Wealth~~~ Short-answer question: What are the properties and characteristics of hydrogen and oxygen? Answer: Hydrogen has reactive chemical properties. It is characterized by a high heat transfer coefficient, high cooling efficiency, strong permeability, and easy diffusibility. Oxygen is a colorless and odorless gas that cannot burn on its own, but it can help other combustible substances burn more vigorously; it is also involved in redox reactions.
Answer: Hydrogen has highly reactive chemical properties; it features a high heat transfer coefficient, high cooling efficiency, strong permeability, and easy diffusion. Oxygen is a colorless and odorless gas. Its melting point is -218.4°C, and its boiling point is -182.9°C. Its density is 1.429 grams per liter (in gaseous state), 1.419 grams per cubic centimeter (in liquid state), and 1.426 grams per cubic centimeter (in solid state). It is poorly soluble in water
What are the properties of hydrogen and oxygen? Answer: Hydrogen is the lightest gas known in the world. Its density is very low, at only 1/14 that of air; under standard conditions (1 atmosphere, 0°C), the density of hydrogen is 0.0899 grams per liter. Therefore, balloons filled with hydrogen must be held tightly by hand. Otherwise, as soon as you let go, it will sparkle its way up into the sky. Hydrogen balloons that have been filled often can’t fly the next day, after just one night. This is because hydrogen can pass through the tiny pores in rubber that are invisible to the human eye and escape. Not only that, but under high temperature and pressure, hydrogen can even pass through thick steel plates. For a balloon to float in the air, the density of the gas inside it must be low (less than that of air). Properties of hydrogen: It is used in oxy-hydrogen flames, hydrogen-oxygen batteries, inflating balloons, and the smelting of important metals such as tungsten and molybdenum. It is also used in the production of ammonia and hydrochloric acid. Liquid hydrogen can serve as a high-energy fuel for rockets or missiles. Hydrogen is also considered a promising new type of high-energy fuel for the future. In organic synthesis, hydrogen is utilized in the synthesis of methanol, synthetic petroleum, and the addition reactions involving unsaturated hydrocarbons. Hydrogen has a wide range of uses. For example, use it to fill balloons ； When hydrogen burns in oxygen, it releases a large amount of heat. The temperature of the resulting flame—the oxy-hydrogen flame—reaches 3,000°C; this flame can be used for welding or cutting metals. Liquid hydrogen can be used as a high-energy fuel for rockets or missiles. As a fuel, hydrogen features abundant availability, high heat release upon combustion, and low pollution. If significant breakthroughs are achieved in the technology for producing hydrogen using solar energy and water in the future, hydrogen will become an important new type of fuel. Hydrogen also has wide applications in metallurgy, the chemical industry, and other fields. Answer: Physical properties of oxygen: ① Color, taste, state: colorless and odorless gas (under standard conditions). ② Melting point: -218.4°C; boiling point: -182.9°C. ③ Density: 1.429 grams per liter (gas), 1.419 grams per cubic centimeter (liquid), 1.426 grams per cubic centimeter (solid). ④ Water solubility: poorly soluble in water. ⑤ Storage: stored in sky-blue cylinders. Chemical properties: (1) Reaction of oxygen with metals: 2Mg + O2 → 2MgO; this reaction occurs violently, producing a bright light and a large amount of heat, with a white solid being formed as a product. 3Fe + 2O2 → Fe3O4; the red-hot iron wire burns violently, with sparks flying and a large amount of heat being released, resulting in the formation of a black solid. 2Cu + O2 → 2CuO; when heated, a black layer forms on the surface of the bright red copper wire. (2) Reaction of oxygen with non-metals: (Carbon + Oxygen → Carbon Dioxide) C + O2 → CO2. This reaction occurs violently, producing white light and heat; it also generates a gas that causes lime water to become turbid. S + O2 → SO2; a bright blue-violet flame is produced, heat is released, and a gas with a pungent odor is generated. 4P + 5O2 → 2P2O5; it burns violently, emitting a bright light, releasing heat, and producing white smoke. (3) Oxygen reacts with certain organic compounds; for example, methane, acetylene, alcohol, paraffin, etc., can burn in oxygen to produce water and carbon dioxide. CH4 + 2O2 → 2CO2 + 2H2O
C2H2 + 5O2 → 4CO2 + 2H2O
C2H2 + 5O2 → 4CO2 + 2H2O
Hydrogen is the least dense gas known in the world; its density is lower than that of air, making it the lightest gas. It is also the substance with the lowest relative molecular mass. Hydrogen is the most abundant element in the universe. The density of hydrogen is only 1/14 that of air – at 0 °C and 1 standard atmosphere, its density is 0.0899 g/L. Therefore, hydrogen can be used as a filling gas for airships and hydrogen balloons (however, due to its flammability and lower safety level, helium is now more commonly used to fill airships). Hydrogen is mainly used as a reducing agent. Physical properties of oxygen: ① Color, taste, state: colorless and odorless gas (under standard conditions) ② Melting point: -218.4°C; Boiling point: -182.9°C ③ Density: 1.429 grams per liter (as a gas) ④ Water solubility: poorly soluble in water ⑤ Storage: sky-blue cylinders ； Chemical properties: Oxygen is a gas with relatively active chemical properties; under high temperatures, it can undergo vigorous chemical reactions with many substances. Its chemical property can be summarized as oxidizing power
The explosion range of hydrogen is 4 to 74. When hydrogen explodes, the explosion becomes more intense in the presence of oxygen. When hydrogen and oxygen mix, an explosive gas is formed. Actually, I’m not sure if this answer is correct; please give me more guidance, OP
Hydrogen has reactive chemical properties; it features a high heat transfer coefficient, high cooling efficiency, strong permeability, and easy diffusion. Oxygen is a colorless and odorless gas that cannot burn on its own, but it can help other combustible substances burn more vigorously; it is also involved in redox reactions.
What are the properties of hydrogen and oxygen? Physical properties of oxygen: ① Color, taste, state: colorless and odorless gas (under standard conditions) ② Melting point: -218.4°C; Boiling point: -182.9°C ③ Density: 1.429 grams per liter (as a gas) ④ Water solubility: poorly soluble in water ⑤ Storage: sky-blue cylinders ； Chemical properties: Oxygen is a gas with relatively active chemical properties; it can undergo vigorous chemical reactions with many substances at high temperatures. Its chemical property can be summarized as oxidizing ability. Physical properties of hydrogen: ① Color, taste, state: colorless and odorless gas (under standard conditions); ② Melting point: -252.87°C; Boiling point: -259.1°C; ③ Density: 0.0899 grams per liter (as a gas); ④ Water solubility: poorly soluble in water ； Chemical properties: At room temperature, hydrogen has very stable properties and does not readily react chemically with other substances. However, under different conditions (such as ignition, heating, or the use of catalysts), the situation changes. Its main properties are flammability and reducibility
One is light, the other is heavy; hydrogen is a combustible substance, while oxygen acts as an oxidizer
What are the properties of hydrogen and oxygen? Answer: Hydrogen has reactive chemical properties. It is characterized by a high heat transfer coefficient, high cooling efficiency, strong permeability, and easy diffusibility. Oxygen is a colorless and odorless gas that cannot burn on its own, but it can help other combustible substances burn more vigorously; it is also involved in redox reactions.
Hydrogen has reactive chemical properties; it features a high heat transfer coefficient, high cooling efficiency, strong permeability, and easy diffusion. Oxygen is a colorless and odorless gas that cannot burn on its own, but it can help other combustible substances burn more vigorously; it is also involved in redox reactions.