Saturated steam at a temperature of 65°C condenses on a vertical plate surface at 55°C. At a location 0.2 m from the plate top, determine the following parameters on the basis of per unit width of the plate. The fluid property values are: ρl = 985 kg/m3; ρv = 0.1614 kg/m3; kl = 0.6513 W/m.K; cp = 4183 J/kg.K; μl = 4.7083×10^– 4 kg/m.s; hfg = 2346.2 kJ/kg (use this value of hfg, where needed, without modifying it). a) find Thickness of the condensate film b) find condensate heat flow rate  c) local convective heat transfer coefficient and condensate flow rate for (b=1)

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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.