Why does evaporation of a liquid also cool the gas above it? ...

[burton19126]

Why does evaporation of a liquid also cool the gas above it?
 
  A) The departing gas molecule takes some kinetic energy with it as it leaves the surface.
  B) The overall heat decreases because the air cools.
  C) The average energy of the system increases because of the increased disorder in the new gas molecules.
  D) The gas molecules need to transfer their kinetic energy to the new slower gas molecule.
  E) none of the above

Question 2

What is a functional group?
 
  A) a set of atoms bonded together that give molecules containing them similar properties
  B) a group that adds function
  C) a group of hydrocarbons that can be used to make new materials
  D) a set of molecules that are grouped together to form a functional material
  E) none of the above

[yasmin]

Answer to Question 1

D

Answer to Question 2

A

[burton19126]

Thanks for the timely response, appreciate it

[tkempin]

Great answer, keep it coming