A chemical or physical change
When a material is heated, the kinetic energy of that material increases and its atoms and molecules move about more. This means that each atom will take up more space due to its movement so the material will expand. ... Some metals expand more than others due to differences in the forces between the atoms / molecules.
Answer:
Explanation:
In a baggie, sodium bicarbonate is decomposed into sodium carbonate and carbondioxie and water is given off as gases:
Think it though and always go back to the cause of the problem