A piece of metal weighing 259.0 g is placed in a graduated cylinder containing 202.9 mL of water. The volume of water now reads 235.0 mL. From these data calculate the density of the metal.

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.

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