Question

2. Which of the following is(are) an endothermic process(es)? (i) Dilution of sulphuric acid (ii) Sublimation of dry ice (iii) Condensation of water vapours (iv) Evaporation of water

Answer 1

Answer:

2 and 4

Explanation:

endothermic means heat is absorbing and in these 2 processes the heat is taken by the particle hence they are called endothermic processes

Answer 2

Answer:

• 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.