Which of the following is not true of exothermic reactions? a. the products of an exothermic reaction have a lower bond energy than the reactants. b. in an exothermic reaction, excess energy is released as heat. c. there is more energy in the bonds of the products than in the bonds of the reactants. d. condensation and combustion are examples of exothermic reactions.

Option B is correct.

B. In an exothermic reaction, excess energy is released as heat.

An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy. Exothermic Reaction means "exo" meaning releases and "thermic" means heat.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.