When I think of you I smile, and when I smile I think of you. I don’t know if it’s the thinking that makes me smile or the smile that keeps me thinking. All I know is I’m always thinking of you and smiling.

Explanation:

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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.