Which characteristic is NOT usually desired in refrigerants?

In the context of refrigerants, the ability to mix with water is generally not desired. Ideally, refrigerants should be chemically stable to ensure safety and efficiency over time. A stable refrigerant can withstand varying temperature and pressure conditions without breaking down or reacting with other substances.

Low boiling points are crucial for refrigerants as they enable efficient thermodynamic cycles, allowing for effective heat absorption and transfer in refrigeration systems. Similarly, non-toxicity is a critical characteristic to ensure safety for both users and the environment, reducing the risks associated with potential leaks or exposures.

When a refrigerant is mixed with water, it can lead to complications such as reduced efficiency, phase separation, or even system corrosion, which can impair the performance of refrigeration systems and lead to costly repairs. Hence, the characteristic that is not desired in refrigerants is their ability to mix with water.