Question

Which statement best compares the energy involved in melting with the energy involved in boiling for a given liquid?

A....Energy is removed from the particles in each change, but more energy is removed in melting than in boiling because the attractions are weaker.

B....Energy is removed from the particles in each change, but more energy is removed in boiling than in melting because the attractions are weaker.

C....Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.

D....Energy is added to the particles in each change, but melting requires more energy than boiling because the attractions must be completely overcome.

Answer 1

C. Energy is added to the particles in each change, but boiling requires more energy than melting because the attractions must be completely overcome.

Answer 2

The correct answer is C. When a solid turns into a liquid the intermolecular forces are just weakens enough to allow the molecules to move around each other. When a liquid turns into a gas the intermolecular forces need to be completely broken since gases ideally do not have any attraction between its particles. It takes a lot more energy to completely brake intermolecular attractions than it does to weaken them.
I hope this helps. Let me know if anything is unclear.