Question

What is the distance separating H₂O molecules in the vapor phase at 373K (100°C)?

a) Shorter than liquid phase
b) Longer than liquid phase
c) Same as liquid phase
d) Unaffected by temperature

Answer 1

The distance between H₂O molecules in the vapor phase at 373K is longer than in the liquid phase due to the increased kinetic energy overcoming intermolecular forces.

Step-by-step explanation:

The distance separating H₂O molecules in the vapor phase at 373K (100°C) is b) Longer than liquid phase. This is due to the fact that in the vapor phase, the water molecules have completely overcome the intermolecular forces holding them together in the liquid phase. At high temperatures, such as 373K, the average kinetic energy of the water molecules increases, allowing them to move further apart from each other compared to their positions in the liquid state.