Question

oxidation of copper explain it
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Answer 1

Answer:

Oxidation occurs as a result of copper's exposure to air, though water --- especially salt water --- heat and acidic compounds can also induce corrosion. Oxidation adds a verdigris color (blue-green) to copper or copper carbonates like brass or bronze.

Answer 2

Answer:

Oxidation of copper and electronic transport in thermally-grown large-grain polycrystals of nonstoichiometric copper oxides were studied at elevated temperatures. Thermogravimetric copper oxidation was studied in air and oxygen at temperatures between 350 and 1000°C. From the temperature dependence of the oxidation rates, three different processes can be identified for the oxidation of copper: bulk diffusion, grain-boundary diffusion, and surface control with whisker growth; these occur at high, intermediate, and low temperatures, respectively. Electrical-conductivity measurements as a function of temperature (350–1134°C) and oxygen partial pressure (10−8–1.0 atm) indicate intrinsic electronic conduction in CuO over the entire range of conditions. Electronic behavior of nonstoichiometric Cu2O indicates that the charge defects are doubly-ionized oxygen interstitials and holes. The calculated enthalpy of formation of oxygen (ΔHO2) and hole-conduction energy (EH) at constant composition for nonstoichiometric Cu2O are 2.0±0.2 eV and 0.82±0.02 eV, respectively.

Explanation:

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