Question

How will you justify that ice, water and steam are not different substances but different states of the same substance?

Answer 1

• When ice (solid state) is heated, it melts and changes to water (liquid state). When water is boiled, it is converted to steam (gaseous state). The process can be reversed upon cooling.
• This justifies that these are the states of a substance. In fact, all the three states are chemically same with the formula H₂O which is water.