Question

A student observed that a small amount of acetone sprayed on the back of the hand felt very cool compared to a similar amount of water. Your explanation of this phenomena should be that
A.) All organic compounds do this
B.) Acetone has a lower viscosity and transfers heat quanta better
C.) Water has a higher heat capacity than acetone therefore retaining more heat
D.) The higher vapor pressure of acetone results in more rapid evaporation and heat loss

Answer 1

Answer:

D.) The higher vapor pressure of acetone results in more rapid evaporation and heat loss

Explanation:

Acetone being liquid with very low boiling point and hence can be easily be converted to gaseous state .

And ,

Therefore have higher vapour pressure and as liquid gets converted to gas , the process of evaporation takes place and leads to loss of heat .

Hence , from the given options , the most appropriate option according to given statement of the question is ( d ) .