Which one of the following is an exothermic process?
Correct answer: C. Respiration
- A. Evaporation
- B. Sublimation
- C. Respiration
- D. Boiling
Explanation
Respiration is the metabolic process where organisms break down glucose and oxygen to produce carbon dioxide, water, and energy. This release of energy makes it an exothermic process. The other options are phase changes that require an input of energy (endothermic).
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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