Question

In which of these changes of state are the particles moving closer together and in which are they moving further apart?

A) solid ethanol --> liquid ethanol

B) ethanol liquid --> ethanol vapour

C) solid carbon dioxide --> carbon dioxide gas

D) steam --> water

Which of these processes require energy?

Is there any link between which processes require energy and the movement of particles? Can you explain this link?

Answer 1

Answer:

Answer is (A) or (D)is answered of iy