Yes, cellular respiration is indeed an exothermic reaction. This process occurs in living organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), a usable form of energy. During cellular respiration, glucose typically undergoes a series of metabolic pathways, including glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation, ultimately resulting in the production of carbon dioxide, water, and ATP.
Since energy is released in the form of ATP as the glucose is broken down, and the overall reaction has a negative change in enthalpy (ΔH), it is classified as exothermic. The energy released is utilized by the cells to perform various vital functions, including muscle contraction, nerve impulse propagation, and biosynthesis of biomolecules.