True or False?
A triangle can have side lengths 4, 5, and 10.
O True
O False

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

Answer// dinosaurs emerged during mesozoic era;