A. exothermic B. endothermic C. chemical D. reactive 相关知识点: 试题来源: 解析 A。释放热量的化学反应称为“exothermic(放热的)”反应,B 选项“endothermic”是吸热的,C 选项“chemical”是化学的,D 选项“reactive”是反应性的,都不符合题意。反馈...
A. endothermic B. exothermic C. isothermal D. adiabatic 相关知识点: 试题来源: 解析 B。本题考查化学反应的类型。A 选项 endothermic 是吸热的。B 选项 exothermic 是放热的,符合题意。C 选项 isothermal 是等温的。D 选项 adiabatic 是绝热的。反馈...
A reaction may involve multiple processes, and some of these may release heat, but as long as a reaction involves a net reduction in temperature, the reaction is endothermic. It's possible for this to happen because a chemical reaction always proceeds in a way that increases entropy. By cont...
In an endothermic Reactions: the reactants have less potential energy than do the products. Energy must be input in order to raise the particles up to the higher energy level. The ionization energy, is the energy required to completely remove a valence electron from a gaseous atom or ion. ...
And then it asked me to tell whether this reaction is endothermic or exothermic: H2+ Cl2---> 2 HCl I know that the bond enthalpy is calculated as Hreagents- Hproducts, but I'm still confused. Isn't the bond enthalpy the energy needed to break the bonds between the ions? Then how ...
A. endothermic reaction B. exothermic reaction C. reversible reaction D. irreversible reaction 相关知识点: 试题来源: 解析 B。exothermic reaction 是放热反应;endothermic reaction 是吸热反应;reversible reaction 是可逆反应;irreversible reaction 是不可逆反应。反馈...
A. always exothermic. B. always endothermic. C. sometimes exothermic and sometimes endothermic. D. neither E. xothermic nor endothermic. 相关知识点: 试题来源: 解析 A。解析:释放能量的化学反应一定是放热反应。选项 B 吸热反应是吸收能量。选项 C 错误。选项 D 不符合释放能量的描述。反馈...
Other types of reactions are redox reactions, acid-base reactions, combustion, isomerization, and hydrolysis.Chemical reactions are everywhere. Learn More What Is the Difference Between a Chemical Reaction and a Chemical Equation? Exothermic and Endothermic Reactions...
In simple terms, the endothermic reactions absorb energy from the surrounding that is in the form of heat. On the other hand, an exothermic reaction releases energy into the surrounding of the system. A popular example of an endothermic chemical reaction is photosynthesis. Is an exothermic reactio...
A method of carrying out an endothermic chemical reaction, whereby a solid reagent is reacted with a gaseous reagent at an elevated temperature of at least 70 DEG C, is described. The method involves mixing the solid reagent with a microwave- absorbing material to form a mixture containing 1...