百度试题 结果1 题目Burning coal is an example of a(n) ___ reaction. A. endothermic B. exothermic C. neutral D. slow 相关知识点: 试题来源: 解析 B。燃烧煤炭是放热反应,所以是 exothermic(放热的)。反馈 收藏
An exothermic reaction releases heat(energy). 放热反应释放出热量(能). The exothermic cable low-temperature radiation heating system is a new type of heating mode that is suitable to the variation of the urban energys structure. 发热电缆低温辐射供暖系统是为适应城市能源结构的变化而出现的一种新型供...
A. absorb B. produce C. transfer D. conduct 相关知识点: 试题来源: 解析 A。解析:在化学反应中,放热反应释放热量,吸热反应吸收热量,“release(释放)”和“absorb(吸收)”是反义词。这里根据化学反应的知识,吸热反应的特征是吸收热量,所以答案是A。反馈 收藏 ...
When the temperature of an exothermic reaction is increased, what happens to the equilibrium? A. Shifts to the right B. Shifts to the left C. No change D. Can't determine 相关知识点: 试题来源: 解析 B。解析:对于放热反应,升高温度,平衡向逆反应方向即向左移动。
Examples of Endothermic and Exothermic Processes Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. This reaction requires 15MJ of energy (sunlight) for every kilogram of...
Ammonium nitrate is added to a beaker containing water.The salt dissociates in the water and the temperature of the solution decreases.8.2.1. Is this an example of an endothermic or exothermic reaction?(1)[16] 相关知识点: 试题来源: 解析 8.1.1.∴y=1/(x+1)8.1.2. Carbon dioxide :...
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...
According to the combustion and exothermic reaction 2H2(g) O2(g)<=>2H2O(l) in a certain system,which methiod can speed up the reaction?A.raise the temperatureB.increase the pressureC.add N2 into the systemD.add C(s) into the system...
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...
Here’s an experiment that is exothermic. What is that? It gives off heat. Chemical reactions create different products. Some reactions create energy, or heat! Go to the link to see the experiment, Hot Ice, and to try it. Watch this exothermic reaction. Explain to a parent what exothermic...