Question

When thermal energy is applied to water, the water’s temperature rises until 100℃ and then stays the same. Which is the best explanation?(1 point)

When the water reaches 100℃, any increase in thermal energy becomes potential energy.

When the water reaches 100℃, any increase in thermal energy goes to breaking the bonds between water molecules as the water boils and becomes steam.

When the water reaches 100℃, the flow of thermal energy reverses, maintaining an equilibrium.

When the water reaches 100℃, it can no longer absorb thermal energy.

Answer 1

Correct answer: "When the water reaches 100℃, any increase in thermal energy goes to breaking the bonds between water molecules as the water boils and becomes steam."

Explanation: At the boiling point added heat is used as latent heat of vaporization to overcome intermolecular forces (hydrogen bonds) and convert liquid to gas, so temperature stays constant until the phase change is complete.