1·Is Hell exothermic or endothermic?
地狱是放热还是吸热？
2·A bottom layer of nickel catalyst was provided to promote the endothermic reaction of steam and methane.
底层镍催化剂促进蒸汽和甲烷的吸热反应。
3·A new catalytic distillation process for the endothermic reaction of the dehydrogenation of isopropanol is developed in this work.
研究开发了一种新的吸热反应的催化蒸馏过程，即异丙醇脱氢的催化蒸馏过程。
4·Thermodynamic parameters depict the endothermic nature of adsorption and the process is spontaneous.
热力学参数表明，吸附过程是自发的和吸热的。
5·A sudden slowing in the rate of temperature increase in a metal being heated, caused by endothermic structural changes and resulting in a darkening of the metal.
吸热（变黑）正在加热中的金属，其温度的升高速度骤然减慢，由吸收了热能的结构变化引起，并导致金属的颜色变黑。