Explanation :
The freezing/melting point of water(H2O) is 0°C while it's boiling point is 100°C.
Thus, at 0°C,process of melting of ice(s)and freezing of water(liquid) occur simultaneously,keeping ice(s) and water(l) in equilibrium.
Similarly, at 100°C, water(liquid) and water vapour (gas) are in equilibrium since both boiling of water(l) and condensation of vapour (g) take place simultaneously.
In between this temperature range i.e between 0°C to 100°C, water exists in liquid state.
Hence it can be concluded that:
at 25°C, physical state of water is liquid
at 0°C, physical state of water is both liquid and solid.
at 100°C, physical state of water is both liquid and gas(vapour).
Final Answer :
The physical state(s) of water at given temperatures are as follows:
At 25°C - Liquid
At 0°C - Both solid and liquid
At 100°C- Both liquid and gas.
