Which of the following is an endothermic process? (a) Dilution of sulphuric acid (b) Sublimation of dry ice (c) Condensation of water vapours (d) Respiration in human beings
Answer: (ii) Sublimation of dry ice and (iv) Evaporation of water An endothermic process is any process that requires or absorbs energy from the system to its surroundings. An exothermic process is any process that releases energy from the system to its surroundings. Fusion, vaporization, and sublimation are endothermic processes. Whereas freezing, condensation, and deposition are exothermic processes. Sublimation of dry ice and evaporation are endothermic processes.
