A wet khus khus screen hung at the door keeps the room cool. why? THis is the question in my unit test . I have written answer as " A wet khus khus keeps the room cool if hung at the door because the water particles in khus khus gains energy from the surrounding to evoporate and thus leaves the surrounding cool." I got 50% marks for the answer. What should be the answer so that i get full marks.
The reasons behind the cooling of room:
- A khus khus has a ability to pass air from itself, and when air passes from wet khus khus, this creates a cooling effect.
- This wet khus khus also show evaporation, and evaporation is an endothermic process means it absorbs energy from surrounding and gives cooling effect.