Ihave a riddle for homework it is "why do people worry so much? "

answer:

because if we don't half of us are gonna get yelled at and the other half are going to have to work at macdonalds..

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.