Reactants defined

Although the special ratio of products to reactants defined by the equilibrium expression is constant for a given reaction system at a given temperature, the equilibrium concentrations will not always be the same. Table 6. 

Reaction order In the expression Rate = [A], it is understood that the notation [A] means the same as [A]i. In other words, for reactant A, the understood exponent 1 is called the reaction order. The reaction order for a reactant defines how the rate is affected by the concentration of that reactant. For example, the rate law for the decomposition of H2O2 is expressed by the following equation. 

Here TScB(EBC,jBC,lA) is the probability that the reactants defined by E, J, EbcJbc. and lA enter the SCR, whereas the bracketed term in Eq. (2.17) gives the distribution of products emerging from the SCR. 

Although the special ratio of products to reactants defined by the equilibrium expression is constant for a given reaction system at a given temperature, the equilibrium concentrations will not always be the same. Table 13.1 gives three sets of data for the synthesis of ammonia, showing that even though the individual sets of equilibrium concentrations are quite different for the different situations, the equilibrium constant, which depends on the ratio of the concentrations, remains the same (within experimental error). Note that subscript zeros indicate initial concentrations. 

Why is the reaction rate for reactants defined as the negative of the change in reactant concentration with respect to time, whereas for products it is defined as the change in reactant concentration with respect to time (with a positive sign) ... 

The mathematical systematization and explanation of lumping techniques are based on defining lumps either as an integral within a continuous set of reactants, defined by a continuous index variable, " or as linear combinations of discrete chemical species. ... 

As discussed above, the difference of the electrochemical potentials, i.e., of the molar electrochemical free energy, between products and reactants defines the thermodynamics of the process. To account for the kinetics, the analogous energy... 

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