Which of the following is an example of an endothermic reaction? A. Burning of wood B. Melting of ice C. Rusting of iron D. Digestion of food 相关知识点: 试题来源: 解析 B。冰的融化是吸热反应。选项 A 木材燃烧是放热反应;选项 C 铁生锈是放热反应;选项 D 食物消化是放热反应。
When endothermic reactions absorb energy, a temperature drop is measured during the reaction. Endothermic reactions are characterized by positive heat flow (into the reaction) and an increase in enthalpy (+ΔH).Examples of Endothermic and Exothermic Processes Photosynthesis is an example of an ...
Conducting endothermic andexothermic reactionsin parallel in the same reactor can be extended to the manufacture of synthesis gas from natural gas. The reaction CH4+ H2O → CO + 3H2is endothermic (ΔH= 206 kJ/mol), while CH4+ 0.5 O2⇌ CO + 2H2is exothermic (ΔH= –38 kJ/mol). Whe...
An example of an endothermic process with which everyone knows is sweating, the process by which the body produces water on the skin as a cooling strategy. It works because water absorbs energy when it changes state from a liquid to a gas. This is an endothermic process, but it isn't a...
On the whole then, in order to maintain a constant body temperature, the heat that is generated in an endothermic mammal must be balanced by the heat lost or gained through radiation, evaporation, conduction, and convection. This is the fundamental equation of thermoregulatory biology. ...
Additionally, to produce the required neutron dose at the object position, both the number of driver protons and their energy need to be greatly increased. As a result, a high dose of γ-rays and neutrons will be distributed at large angles and spoil the advantages of the endothermic ...
vacancy (Supplementary Fig.1c). The O-vacancies are strongly binding to the OH* intermediate (ΔGOH* = −2.51 eV), indicating the O-vacancies do not contribute to the 2e-WOR. Since the formation of additional O-vacancies in LaAlO3is strongly endothermic (by ~3 eV) as ...
whereas metal sorption can decrease with decreasing temperature because of the endothermic energetics [10]. In addition, macroscopic sorption behaviors of single metal can be strongly affected by coexisting metal cations in solution. Murali and Aylmore studied the competition sorption behavior of several...
Reptiles are the ancestors of birds and the mammals, both of which are endothermic, meaning that body heat is primarily generated within their bodies. Their dependence on the external heat sources limits reptiles to tropical and temperate regions of the earth and they are especially numerous in ...
The exothermic process of molecules being transferred from gas or liquid phase to the surface of the solid phase is called adsorption; in reverse, molecules sticking to the surface of the solid phase returning to the gas or liquid phase is called desorption, which is an endothermic process. The...