thermal energy?

Question

if a solid candle melts into a liquid wax.....
-thermal energy was taken away from the candle to melt it
-the melted candle has more mass than the solid candle did
-the particles of the candle move faster and farther apart in the liquid state
-the particles of the candle change into different particles when the candle melts

Answer 1

if a solid candle melts into a liquid wax.....then

the particles of the candle move faster and farther apart in the liquid state. This is because a liquid is a higher energy state than a solid.

The other 3 answers are wrong because:
- thermal energy was taken away from the candle to melt it: An object must be heated to melt.

-the melted candle has more mass than the solid candle did: Changing the state of a compound does not add or decrease mass - the mass is conserved.

-the particles of the candle change into different particles when the candle melts: By definition, "melting" is when a compound transforms from a solid to a liquid, thus, the compound is not undergoing a reaction, which would be required to change.