The correct answer is:
a. The particles will have more space between them and will be moving at higher speeds as steam.
Explanation:
At 100°C, water exists as both liquid and gas (steam) at this boiling point, but the physical properties of the two states are different. In liquid water, particles are closer together and more structured due to intermolecular forces, while in steam, the particles are much farther apart and have higher average kinetic energy, leading to faster movement. Thus, steam has both more space between the particles and higher speeds compared to liquid water at the same temperature.