Why does bubble appear when a liquid is heated?
pri22:
because the lower molecules of water is heated and became light and go upper side and the heavy molecules come lower side this is the cause of bubbles
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When water is boiled, the heat energy is transferred to the molecules of water, which begin to move more quickly. Eventually, the molecules have too much energy to stay connected as a liquid. When this occurs, they form gaseous molecules of water vapor, which float to the surface as bubbles and travel into the air.
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due to heat gases comes out from liquid layer
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