“chemical equation”的概念、定义、翻译、参考文献-科学参考

chemical equation

Chemistry

A way of denoting a chemical reaction using the symbols for the participating particles (atoms, molecules, ions, etc.); for example,
$x A + y B \to z C + w D$
The single arrow is used for an irreversible reaction; double arrows (⇌) are used for reversible reactions. When reactions involve different phases it is usual to put the phase in brackets after the symbol (s = solid; l = liquid; g = gas; aq = aqueous). The numbers x, y, z, and w, showing the relative numbers of molecules reacting, are called the stoichiometric coefficients. The sum of the coefficients of the reactants minus the sum of the coefficients of the products (x + y – z – w in the example) is the stoichiometric sum. If this is zero the equation is balanced. Sometimes a generalized chemical equation is considered
$ν_{1} A_{1} + ν_{2} A_{2} + \dots \to \dots ν_{n} A_{n} + ν_{n + 1} A_{n + 1} \dots$
In this case the reaction can be written Σν‎_iA_i = 0, where the convention is that stoichiometric coefficients are positive for reactants and negative for products. The stoichiometric sum is Σν‎_i.

Chemical Engineering

The use of symbols to present a chemical reaction. The equation provides a mathematically balanced number of atoms present in the reaction such that the left-hand side presents the reactants and equals the right-hand side, which presents the products. An example is the combustion of methane in oxygen (reactants) to form carbon dioxide and water (products):
$C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$

单词	chemical equation
释义	chemical equation Chemistry A way of denoting a chemical reaction using the symbols for the participating particles (atoms, molecules, ions, etc.); for example, $x A + y B \to z C + w D$ The single arrow is used for an irreversible reaction; double arrows (⇌) are used for reversible reactions. When reactions involve different phases it is usual to put the phase in brackets after the symbol (s = solid; l = liquid; g = gas; aq = aqueous). The numbers x, y, z, and w, showing the relative numbers of molecules reacting, are called the stoichiometric coefficients. The sum of the coefficients of the reactants minus the sum of the coefficients of the products (x + y – z – w in the example) is the stoichiometric sum. If this is zero the equation is balanced. Sometimes a generalized chemical equation is considered $ν_{1} A_{1} + ν_{2} A_{2} + \dots \to \dots ν_{n} A_{n} + ν_{n + 1} A_{n + 1} \dots$ In this case the reaction can be written Σν‎_iA_i = 0, where the convention is that stoichiometric coefficients are positive for reactants and negative for products. The stoichiometric sum is Σν‎_i. Chemical Engineering The use of symbols to present a chemical reaction. The equation provides a mathematically balanced number of atoms present in the reaction such that the left-hand side presents the reactants and equals the right-hand side, which presents the products. An example is the combustion of methane in oxygen (reactants) to form carbon dioxide and water (products): $C H_{4} + 2 O_{2} \to C O_{2} + 2 H_{2} O$
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