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Changes in States of Matter and the Kinetic Particle Theory
Matter can change from one state to another. When you taste an ice cream it changes from solid to liquid state due to the transfer of heat energy from your body to the ice cream. According to kinetic particle theory, particles of matter are in constant motion as they possess kinetic energy. As we discussed earlier, gases have more kinetic energy than the liquids and solids. Solids have the least kinetic energy.
When matter is either heated or cooled, heat energy is either absorbed or given out. is causes change in the energy of the particles leading to change of state. These changes are reversible physical changes.
· solid melts into liquid
· liquid vaporises into gas
· gas condenses into liquids
· liquid freezes or solidifies into solid
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