Explain the changes in molecular motion of particles as they change from solid to liquid to gas. A) As the phase changes occur, the freedom of motion of the particles increases. B) As the phase changes occur, the freedom of motion of the particles decreases. C) As the phase changes occur, the freedom of motion of the particles compresses. D) As the phase changes occur, the freedom of motion of the particles is constant.

The correct  statement is option A : As the phase changes occur, the freedom of motion of the particles increases.

At the solid state, the molecules of solid are tightly packed and they are unable to move freely. When heat is applied to solid,  it melts and the molecules of the solid gains kinetic energy and therefore tends to shift away  due to heat.

This kinetic energy possesses by this molecules allow them to move freely. When further heat is applied to the liquid above the boiling point the molecules of the water vapourises and these molecules gain more kinetic energy more than they do in liquid state and were able to move freely more than in liquid.

This shows that the freedom of the particles (molecules) increase with change in state from solid to gas.

Therefore we conclude that as the phase change occurs, the freedom of motion of of the particles increases.

Hence The correct  statement is option A : As the phase changes occur, the freedom of motion of the particles increases.

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As the phase changes occur, the freedom of motion of the particles increases

Explanation:

As the phase changes occur from solid to gas, the freedom of motion of the particles increases

At the solid state (let's say ice), the molecules of the solid are tightly packed and they are unable to move freely. When heat is applied to the state of the solid, ice it melts and the molecules of the solid gains kinetic energy and therefore tends to shift away from their mean fixed position due to heat. This kinetic energy possesses by this molecules allow them to move freely (energy due to motion). When further heat is applied to the liquid (above the boiling point), the molecules of the water vapourizes(turns to gas) and this molecules gain more kinetic energy more than they do in liquid state and were able to move freely more than in liquid. This shows that the freedom of the particles (molecules) increase with change in state from solid to gas.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.