Any reaction that absorbs 150 kcal of energy can be classified as ________.

endothermic. endo...taking in...

To classify a reaction as a specific type, we need to look at its energy change. In this case, we are told that the reaction absorbs 150 kcal of energy.

To determine the classification of such a reaction, we can refer to the common terms used for energy changes in chemical reactions. One such term is "endothermic."

An endothermic reaction is a type of reaction that absorbs energy from its surroundings, resulting in an increase in the system's (i.e., the reacting substances) internal energy. So, any reaction that absorbs 150 kcal of energy would be classified as an endothermic reaction.

In summary, a reaction that absorbs 150 kcal of energy can be classified as an endothermic reaction.