Imagine a small, bright object appeared in the sky, moved along with a nearby constellation, and then disappeared a year later. Scientists in China Persia Europe, Nand Central America observed the event. Where did this phenomenon most likely occur. How do you know? (Please help me)

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

The answer is false,  hope my answer is : )