A partition divides an insulated tank into two parts which are not equal. One part of the tank contains 5 kg of compressed liquid water at 65°C and 600 kPa while the other part is evacuated (Hint: For compressed liquids, if tables are not available, use properties of the saturated liquid at the specified temperature). The partition is then removed, and the water expands to fill the entire tank. Determine the final temperature of the water and the volume of the tank for a final pressure of 20 kPa.

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Properties of Pure Substances

A substance with fixed chemical composition throughout is called a pure substance like water, air, and nitrogen. A pure substance does not have to be a single element or compound. A mixture of two or more phases of a pure substance is also a pure substance as long as the chemical composition is the same for all phases. These substances mainly have a constant/ uniform composition. The substances also have fixed boiling and melting points. A pure substance takes part in a chemical reaction to form predictable products.