The enthalpy of a reaction is the algebraic sum of the energy absorbed for bond breaking and the energy released in the bond making. We take the energy required for bond-breaking as positive enthalpy.Answer and
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 ...
The products of the reforming reaction are transported at near ambient temperatures to a downhole heat exchanger through which water is circulated. There a catalyst triggers the methanation reaction, liberating heat energy to convert the water to steam. The products of the methanation reaction are ...
In endothermic reaction AHeat evolved is given positive sign BChange in enthalpy is given negative sign CHeat absorbed is given negative sign DNone of theseSubmit In an endothermic reaction View Solution For an endothermic reaction View Solution For an endothermic reaction, View Solution One of ...
In a reaction, the absorbed energy is 800 kJ to break old bonds, and 400 kJ is released on forming new bonds. What is Delta Erxn? Is this reaction exothermic or endothermic? What is an exothermic reaction? A. It is a reaction where there...
The use of a CA:Me2+ molar ratio equal to 1:1 resulted in a material with the highest initial volumetric energy density but poor stability. The SrO conversion of SG-60-CA1-pHA at the first cycle exceeded 1 (maximum theoretical value), which is indicative of an over-stoichiometric ...
Energy density The energy per unit volume (litre) of battery Galvanic cell Usually just referred to as a cell. A device which when charged with electricity is in a higher energy state than when discharged. On discharge the chemical energy stored is released as an electrical current LCO cathode...
In such storage systems, the surplus of energy will be exploited in an endothermic reaction to dehydrate the salt hydrates. Once it is demanded, the ... K Walayat,J Duesmann,T Derks,... - 《Applied Thermal Engineering Design Processes Equipment Economics》 被引量: 0发表: 2021年 Double-lay...
CaS is oxidized in air in the oxidizer reactor 14 to form hot CaSO4 which is discharged to the reducer reactor 16. Hot CaSO4 and carbonaceous fuel received in the reducer reactor 16 undergo an endothermic reaction utilizing the heat content of the CaSO4, the carbonaceous fuel stripping the ...
high energy efficiency and susceptibility to integration1. Caloric effects are exhibited in materials where phase transition with thermal change can be induced by external fields, such as magnetic, electric and mechanical field. Specifically, the magnetic and electric fields can drive magnetocaloric and ...