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As a sample of water turns to ice, C the arrangement of the molecules changes.
There are two reactions that may occur in a substance, namely physical changes and chemical changes
The classification of these two changes is based on the initial and final conditions of the substance
Changes in physics do not form new substances and the properties of the particles remain the same.
Changes that occur include the shape, size or volume
Example:
When the water is at its freezing point of 0 °C, the movement of the molecules will decrease and the water molecules will unite in a new state, forming ice (freezing)
A. New molecules are formed.
There is no chemical change in this process, water only changes form. Ice is the solid form of water
B the mass of the sample is increased.
The mass before and after the change will remain the same
C the arrangement of the molecules changes.
Water molecules at low temperatures will bond together to form solids
D energy is absorbed by the molecules.
Freezing will release heat energy into the environment while melting will need energy
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