InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
(a)Comment on the statement: 'Evaporation causes cooling(b)Why we feel cool when we pour acetone on our palm? |
|
Answer» (b) because acetone evaporate very quickly in the atmosphere and also take all the heat from the surrounding that's why we feel cool See,for a.)it is so because when evaporation occurs,the transfer of heat takes place between the surrounding and the system(from what evaporation is taking place,eg.water).Due to which,on evaporation the water molecules in air which are more warmer in comparison to the surrounding air molecules,absorb heat from the nearby air molecules to attain equilibrium. In the same way,you can think of b.)alsoTry it by yourself. a) evaporation is an endothermic process and it absorbs heat while evaporating and causes cooling effectb) Whenweput someacetonethen it evaporates andwecould feel cold onpalm. it is becauseAcetoneis called as low boiling liquids. Whenacetone is poured on palmit readily changes into vapours. ... Thus it evaporates andweget acoolingsensation |
|