Specify whether the steam is wet, dry, or superheated for the following condition.  (a) 16 MPa,  t = 306 degree celcius (b) 3 MPa, h = 3018 Kj/kg (c) 300 degree celcius, h= 3062 Kj/kg (d) S = 5.1044 Kj/kg-R,  P = 18 MPa

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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.