Water is stored in a closed tank of capacity 0.1m3. The quality of water is 60% and initial pressure is 7 bar. Heat is transferred to the water until the tank contains only saturated vapour. At the end of this process, determine the mass of vapour in the tank, and the final pressure inside the tank.

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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.