Challenge the plastic figures in the picture
are insoluble in the blue liquid. what else
can you tell about their solubility?

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

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.