Which of the following is the same for both Senators and Representatives? The length of time they have been US citizens.
The minimum age at the time of their election.
The number of years they serve per term.
The number of times they can be re-elected

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