When a substance such as ice melts, its temperature increases. describe what happens to the arrangement of the water molecules as the temperature increases.
a) water molecules separate into hydrogen and oxygen atoms.
b) water molecules become less orderly and they spread apart.
c) the kinetic energy of the water molecules decreases proportionally to the temperature change.
d) water molecules lose all contact with one another and intermolecular forces are non-existent.
elim

B) Water molecules become less orderly and they spread apart.

Explanation:

Solid state: The sate in which the inter molecular forces are strongest and thus particles are highly ordered

Liquid state: The state in which the inter molecular forces are weaker than solids and thus particles are not very highly ordered.

When ice in solid form melts, it changes to liquid state and is a physical change. The molecules become less ordered on moving from solid to liquid state.

A) Water molecules separate into hydrogen and oxygen atoms: This  is a chemical change.

C) The kinetic energy of the water molecules decreases proportionally to the temperature change: When ice melts the kinetic energy pf the molecules increase.

D) Water molecules lose all contact with one another and inter molecular forces are non-existent: In liquid state, the inter molecular forces are existent.

the product of the pressure and volume is also constant