Take a block of ice in a 20 cm<3 of beaker.heat it.what is the change observed.continue heating till water begins to boil.observe that water level decreases.what can we conclude ???
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Solution
When ice block starts to heat, it melts and turns to completely water and hence volume will increase than 20 cm³. As we continue heating it vaporises and vapour get escaped from the vessel , so volume decreases