If the mass increases, then the volume will , and the density will .

If the mass increases, then the volume will decrease and the density will remains same because it doesn't depend on mass

Explanation:

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.