The Tc and Pc values of water are very high compared to the room temperature and common atmospheric pressure. As a result, water exists in liquid state under ordinary condition of temperature and pressure.
Why does water exist in the liquid state under ordinary conditions?Water exists in the liquid state under ordinary conditions because its critical temperature (Tc = 647.1 K) and critical pressure (Pc = 220.6 bar) are significantly higher than room temperature and common atmospheric pressure.
The critical temperature is the temperature above which a substance cannot exist in the liquid state regardless of the pressure applied and the critical pressure is the pressure required to convert a substance into a liquid at its critical temperature.
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