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Chemically Reacting Flows
Published in Greg F. Naterer, Advanced Heat Transfer, 2018
The rate equation for a chemical reaction is used to relate the rate of the reaction to the concentration of each reactant. It is typically expressed as follows: r=kCAnCBm where k is the reaction rate coefficient or rate constant, and the exponents n and m are called reaction orders. For gas phase reactions, the reaction rate is often expressed instead in terms of partial pressures of each constituent. The rate constant includes the effects of all parameters (except concentration) on the reaction rate. Usually, temperature is the most significant factor.
Reaction Rates, Molecularity and Rate Law
Published in Eli Usheunepa Yunana, Calculations in Chemical Kinetics for Undergraduates, 2022
Rate law is the way the rate of a chemical reaction varies with reactant concentration. The rate equation is an experimentally determined equation that is consistent with the law of mass action in chemical reactions. This law states that the rate of a chemical reaction is directly proportional to the active masses of reactants.
Fundamentals and Applications of Reaction Kinetics
Published in C. Anandharamakrishnan, S. Padma Ishwarya, Essentials and Applications of Food Engineering, 2019
C. Anandharamakrishnan, S. Padma Ishwarya
The exponent n in Eq. (8.11) is termed the order of the reaction. Order of a reaction is defined as the sum of the exponents of the reactant concentration terms in the rate equation. Classification of reactions is done based on their order.
Reaction Mechanism of In-situ Carbon in Hematite Ore Pellet during Induration
Published in Mineral Processing and Extractive Metallurgy Review, 2022
Ammasi Ayyandurai, Jagannath Pal
CO gas is more stable at high temperatures than CO2. Since the pellet induration temperature is very high (Above 1473 K), mainly CO gas will be produced and the CO2 gas formation will be negligible. Reaction (1) happens at this temperature and its rate will be kinetically faster with the increase in temperature as per the Arrhenius rate equation. Due to the faster rate of reaction, more amount of CO will be generated and hence the heat will be evolved at the high temperature.