Question

is there any change in mass when a substance changes its state​?Explain with example

Answer 1

Nope !
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mass remains same all the time 
mass is constant 
Which is depend upon the  gravity and also speed of light 
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Answer 2

no there is no change in mass  When a substance changes its state , there will not be any change in the mass of substance . For example , if we change 100 grams of water (liquid) to ice(solid) , the mass of ice will be same i.e., 100 grams . This shows there is no change in the mass even if a substance changes its state .