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A single-displacement reaction, also known as single replacement reaction or exchange reaction, is an archaic concept in chemistry.It describes the stoichiometry of some chemical reactions in which one element or ligand is replaced by atom or group.
The law states that the total enthalpy change during the complete course of a chemical reaction is independent of the sequence of steps taken. [ 2 ] [ 3 ] Hess's law is now understood as an expression of the fact that the enthalpy of a chemical process is independent of the path taken from the initial to the final state (i.e. enthalpy is a ...
The Solvay Process as an example of a cyclic process in chemical industry (green = reactants, black = intermediates, red = products) The Solvay process results in soda ash (predominantly sodium carbonate (Na 2 CO 3)) from brine (as a source of sodium chloride (NaCl)) and from limestone (as a source of calcium carbonate (CaCO 3)). [8] The ...
In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical reaction occurs. [1]A chemical mechanism is a theoretical conjecture that tries to describe in detail what takes place at each stage of an overall chemical reaction.
These three gas laws in combination with Avogadro's law can be generalized by the ideal gas law. Gay-Lussac used the formula acquired from ΔV/V = αΔT to define the rate of expansion α for gases. For air, he found a relative expansion ΔV/V = 37.50% and obtained a value of α = 37.50%/100 °C = 1/266.66 °C which indicated that the value of ...
Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism.
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A possible mechanism in two elementary steps that explains the rate equation is: NO 2 + NO 2 → NO + NO 3 (slow step, rate-determining) NO 3 + CO → NO 2 + CO 2 (fast step) In this mechanism the reactive intermediate species NO 3 is formed in the first step with rate r 1 and reacts with CO in the second step with rate r 2.
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