steam at 105 °C because gas particles are the most mobile and mobility increases with increasing temperature
Explanation:
The substance with the highest mobility would be steam at 105 °C because gas particles are the most mobile and mobility increases with increasing temperature.
Mobility is the movement of the particles in a medium.
It increases the randomness of particles.
Of all the states of matter, gases are the most random of all.
Also, mobility increases with increase in kinetic energy.
As temperature increases, kinetic energy will also increase and cause more mobility.
