1-A rigid tank having the volume of 5 m contains saturated water vapor-liquid mixture at 0.2 MPa. The volume percentage of the saturated liquid in the mixture is 1 %, initially. The tank is heated until it is filled with saturated vapor. a) What is the initial temperature? b) What is the final pressure and temperature? c) Calculate the amount of heat to be transferred, as kJ

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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.