Use kinetic-molecular theory to describe what happens when an ice cube or icicle melts. include how energy is involved and what happens to the motion of the water molecules

Kinetic-molecular theory explains the behavior of matter in the environment.

The kinetic molecular law states that the molecules are moving at a constant motion.

In the solid, due to closely bonded atoms and the high intermolecular forces, the vibration and oscillation are very less. The ice cube is solid with high intermolecular forces.

On the melting of the ice cube, the water molecules gain energy and intermolecular forces are reduced. The fewer intermolecular forces result in the change in the state of the ice, and the water is formed.

Thus the melting of ice will result in the gain of the energy that results in the increased motion of the water molecules.

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first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

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