a chemist dilutes 425mL of a 0.105 M HCl solution to make a final volume of 1.0 L. What is the molarity of the final volume?

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.