Consider the following reaction. 2AgNO3 + MgBr2 → 2AgBr + Mg(NO3)2
Question: When 22.5 grams of AgNO3 react, how many moles of Mg(NO3)2 are produced?

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.

a electronegativity decreases beacuse the size of nucleus is bigger.