A 2.00 mL of substance A has a density of 18.4 g/mL and a 5.00mL sample of substance B has a density of 35.5 g/mL. Do you have an equal mass of Substances A and B.

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.

gas

explanation:

smoke is the matter of a gas