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For gases, departure from 3 R per mole of atoms is generally due to two factors: (1) failure of the higher quantum-energy-spaced vibration modes in gas molecules to be excited at room temperature, and (2) loss of potential energy degree of freedom for small gas molecules, simply because most of their atoms are not bonded maximally in space to ...
Copper monosulfide is a chemical compound of copper and sulfur. It was initially thought to occur in nature as the dark indigo blue mineral covellite . However, it was later shown to be rather a cuprous compound, formula Cu 3 S(S 2 ) . [ 4 ]
The matte, which is produced in the smelter, contains 30–70% copper (depending on the process used and the operating philosophy of the smelter), primarily as copper sulfide, as well as iron sulfide. The sulfur is removed at a high temperature as sulfur dioxide by blowing air through molten matte: 2 CuS + 3 O 2 → 2 CuO + 2 SO 2 CuS + O 2 → ...
Sulfur (monoclinic) Solid S 8: 0.3 Sulfur (rhombic) Solid S 8: 0 Hydrogen sulfide: Gas H 2 S −20.63 Sulfur dioxide: Gas SO 2: −296.84 Sulfur trioxide: Gas SO 3: −395.7 Sulfuric acid: Liquid H 2 SO 4: −814 Titanium: Gas Ti 468 Titanium tetrachloride: Gas TiCl 4: −763.2 Titanium tetrachloride: Liquid TiCl 4: −804.2 Titanium dioxide ...
Cu 2 S can be prepared by treating copper with sulfur or H 2 S. [2] The rate depends on the particle size and temperature. [5] Cu 2 S reacts with oxygen to form SO 2: [6] 2 Cu 2 S + 3 O 2 → 2 Cu 2 O + 2 SO 2. The production of copper from chalcocite is a typical process in extracting the metal from ores.
Copper is sometimes used in decorative art, both in its elemental metal form and in compounds as pigments. Copper compounds are used as bacteriostatic agents, fungicides, and wood preservatives. Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c ...
A typical phase diagram.The solid green line applies to most substances; the dashed green line gives the anomalous behavior of water. In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. [1]
Upon being mixed with shale or marl, and roasted, the sulfate liberated sulfur dioxide gas, used in sulfuric acid production, the reaction also produced calcium silicate, a precursor in cement production. [21] On a laboratory scale, the action of hot concentrated sulfuric acid on copper turnings produces sulfur dioxide. Cu + 2 H 2 SO 4 → CuSO ...