Which of the following is (are) on endothermic process(es)?(i) Dilutio...
Endothermic Processes
Dilution of sulphuric acid
- Dilution of sulphuric acid is an exothermic process as it releases heat during the reaction.
Sublimation of dry ice
- Sublimation of dry ice is an endothermic process as it requires heat input to change the solid directly into a gas without passing through the liquid phase.
Condensation of water vapours
- Condensation of water vapours is an exothermic process as it releases heat when water vapours change into liquid water.
Evaporation of water
- Evaporation of water is an endothermic process as it requires heat input to change liquid water into water vapour.
Therefore, the endothermic processes in the given options are (ii) Sublimation of dry ice and (iv) Evaporation of water. So, the correct answer is option B - (ii) and (iv).
Which of the following is (are) on endothermic process(es)?(i) Dilutio...
Sublimation of dry ice and evaporation of water both are endothermic process and these heat (energy) from their surrounding to get sublime or evaporate. Hence, both these processes produce cooling. This is the reason for using dry ice as refrigerant.
Dilution of sulphuric acid and condensation of water vapours evolve heat. Hence, these are exothermic processes.