Which of the following laws is not explained by dalton's atomic theory? a. the law of conservation of mass b. the periodic law c. the law of multiple proportions d. the law of definite proportions

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.