In refrigeration terminology, what is the state of the water we drink?

The correct characterization of the state of water that we drink is as a sub-cooled liquid. This choice accurately represents water in its liquid state at a temperature below its boiling point, which is commonly encountered in everyday situations.

When water is consumed, it is typically at a temperature below 100 degrees Celsius (212 degrees Fahrenheit) under standard atmospheric pressure. This temperature is well below the boiling point of water, indicating that it remains in the liquid phase without transitioning into vapor. Sub-cooled liquid refers to any liquid that has been cooled to a temperature lower than its saturation temperature at a given pressure, thus preventing it from boiling and turning into steam.

Understanding the states of water is essential in refrigeration and HVAC applications, as it illustrates the principles of heat transfer, phase changes, and thermodynamics that are fundamental to the operation of cooling systems.