Which sentence correctly sequences the underlined verbs? we will not receive the final pieces that we needed to complete the collection. we will not receive the final pieces that we had needed to complete the collection. we have not received the final pieces that we will need to complete the collection.

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.

l dont know l am s sorry