Question

When the water is boiling what cause the water to boil?
a. Heat transfer
b. electricity
c. condensation
d. energy loss

Answer 1

condensation is the process of gas molecules forming a liquid, so it's not C.

Going from liquid form to a gas, i.e., boiling, requires energy, so it can't be D.

Electricity is a form of energy, but water can boil without it. Think of a kettle over a camp fire.

So the only logical choice is ...

Answer 2

In materials,molecules are in a motion. They are bound by weak vander walls forces; when we heat them this molecules gain energy to break weak forces between them and go into air as vapor. In solids this bond is little strong. This is because of jiggling motion of molecules. So choices are not perfectly apt; we can consider heat transfer.

Answer 3

@kuk: If you're going to trot out the big guns, at least spell them correctly. Van der Waals. ;-)

Answer 4

heat transfer is the right one,because for boiling the water u have to break the forces which are between the molecules as a result u have to use energy and heat is the right one...so the right choice would be A

Answer 5

@james I am focusing more on the concept rather than spells, and do understand the intention...