1.What phase change is being observed when ice melts? * 2. What phase change is being observed when water droplets are found outside the glass of a cold water?

3. When dry ice (CO2) is placed on top of the table, after couple of minutes there is no dry ice left. What kind of phase change is it?

4. How do we classify the phase changes in matter if we put water in the freezer of the refrigerator? ​