A chemical reaction is exothermic when: A. 质容质容The products have more energy than the reactants质容质容 B. 联反方放话实支米走平情果联反方放话实支米走平情果The reactants have more energy than the products联反方放话实支米走平情果联反方放话实支米走平情果 C. 象支而习安装火七...
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. 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...
1. Understanding Exothermic Reactions: - Exothermic reactions are those in which energy is released during the process. In nuclear physics, these reactions can occur in two main scenarios: - When two light nuclei fuse together (nuclear fusion). - When a heavy nucleus splits into smaller nuclei...
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. endothermic B. exothermic C. isothermal D. adiabatic 相关知识点: 试题来源: 解析 B。两种物质反应并释放热量,这是放热反应。选项 A“endothermic”是吸热反应;选项 C“isothermal”是等温的;选项 D“adiabatic”是绝热的,都不符合释放热量的特点。反馈...
The change that takes place when temperature is changed depends upon whether the forward reaction is exothermic or endothermic. If the forward reaction is exothermic then the backward one is endothermic. 吸热反应,升温,平衡向正向移动。If the temperature is increased, the equilibrium moves to the left...
1 The forward reaction is exothermic. 2 The enthalpy change for the forward reaction is –30 kJ mol–1 . 3 The enthalpy change for the backward reaction is +90 kJ mol–1 . 35 The structure of metals is considered to be positive ions surrounded by delocalised electrons. The melting points...
Combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen to produce heat and light. Combustion reactions are very important in our daily lives. For example, when we burn wood or coal, a combustion reaction takes place. The conditions for a combustion reaction ...
Acid-base neutralization reaction is usually ___. A. endothermic B. exothermic C. neither endothermic nor exothermic D. sometimes E. ndothermic and sometimes exothermic 相关知识点: 试题来源: 解析 B。解析:文中提到酸碱中和反应通常是放热的。反馈...