Watch the video and answer to these questions:   http://www.youtube.com/watch?v=tHM0UkhwfsQ       Is evaporating water a reversible or irreversible change? Why?   Is condensating water a reversible or irreversible change? Why?   Is freezing water a reversible or irreversible change? Why?    Is melting water a reversible or irreversible change? Why?    Is mixing salt with water a reversible or irreversible change? Why?    Is mixing cement with water a reversible or irreversible change? Why?    Is burning a reversible or irreversible change? Why?