Determine the specific volume of superheated water vapor at 15.65 MPa and 355.11 C, using the generalized compressibility chart. Assume that the compressibility factor is 0.65. Round off your answer to 4 decimal places. R = 0.4615 kPa·m3/kg·K    Tcr = 647.1 K

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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.