I am having a hard time making sense of the terms in the chapter. I work with endothermic and exothermic reactions all the time but understand there meanings to be the opposite of what is in the lesson. If I combine HCHO and NaOH in a reactor, this will generate a LOT of heat and is considered to be highly exothermic, but the lesson categorizes this as endothermic because of the temp increase. Likewise, I have referred to reactions that drop temp, to be endothermic. Can you help me make sense of this?