19. If it takes more energy to break the bonds of the reactants than is released when the bonds of the products are formed, the reaction is
20. If a reaction is
, more energy is released when the bonds of the products are
formed than it takes to break the bonds of the reactants.

If a substance is not at its melting or boiling point, as the heat content of a sample of matter increases, its temperature increases the number of intermolecular bonds decreases the space between particles increases the particles move faster

Identify a strong intermolecular force of attraction between an alcohol

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange