Determine the quantity (volume) of saline water in a steam generator. The heat energy of 1624 kJ is supplied to saline water in the steam generator to heat from 24°C to 101°C for the generation of water vapor, Take the density & specific heat of the solution as 1015 kg/m³ & 4.6 J/kg°K respectively. Solution: Change in Temperature (in K) Mass of the saltwater (in kg) Quantity (Volume) of saltwater (in m3)

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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.