34 DUTY TO WARN it is really a Type B special relationship based on a profes-sional's general obligation to the community he serves.
Endothermic reactions: Heat is absorbed. 1) Photosynthesis: Plants absorb heat energy from sunlight to convert carbon dioxide and water into glucose and oxygen. 2) Cooking an egg: Heat energy is absorbed from the pan to cook the egg. Exothermic reactions: Heat is released.
Endothermic reactions absorb energy from the environment, while exothermic reactions release energy to the environment. Distinguish between endothermic and exothermic reactions. 1  All chemical reactions involve the transfer of energy.  Endothermic processes require an input of energy to proceed and are signified by a positive change in enthalpy.