对于特定的化学反应，反应级数（order of reaction）被定义为速率方程中各浓度项的幂次之和。反应级数由化学反应机理（reaction mechanism）决定，反应机理描述了反应的各瞬间阶段，这些瞬间反应会产生中间物，从而可以控制反应级数。反应级数在探讨反应机理的研究中有重要意义。
反应级数 [物化] Reaction Order
失活反应级数 order of deactivation
界面反应级数 interface reaction order
总反应级数 overall reaction order
反应级数和反应分子数 reaction order and molecularity
反应级数及速率 reaction order and rate
准级数反应 pseudo order reaction
反应的总级数 overall order ; overall order of reaction
变级数反应 shifting order reaction
假级数反应 pesudo-order reaction
Based on the Kissinger formula,Ozawa formula and Crane formula,the apparent activation energy(E_a)and reaction series of curing reactions were calculated.
根据Kissinger公式、Ozawa公式和Crane公式计算出各固化体系的反应活化能E_a和反应级数。
参考来源 - 环氧封端PPESK的合成与固化研究The dates collected by detecting the content of the end-carboxyl and handled by statistical analysis showed that the reaction order for ESO and PLLA oligomer was 1 and 0.5 respectivelly.
结果表明扩链反应级数对于ESO和乳酸低聚物分别为1级和0.5级。
参考来源 - 环氧化合物扩链的高分子量聚乳酸的熔融合成与性能研究The kinetics of the curing processes of optimum prescription was analyzed by Kissinger and Crane equations, and discussed the curing kinetic parameters of the curing systems: the activation energyEa=48.3kJ/mol, the reaction order value n=0.86.
同时对该配方固化反应进行了动力学分析,得出固化动力学参数:表观活化能Ea=48.3kJ/mol,反应级数n=0.86。
参考来源 - 高压电机用环氧绝缘浸渍漆的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
测得了其解离反应级数、速率常数和解离能量阈值。
The order of reaction, Tate constant and threshold energy have been measured.
试验证明：温度和转速对酸岩反应的反应级数无影响。
Experiments showed that temperature and rotating rate did not affect reaction indices.
测定了反应级数和反应活化能，建立了反应动力学方程。
The reaction order and reaction activation energy are determined and the reaction kinetics equation is set up.
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