Steam leaves an industrial boiler at 645.3kPa and 151.2°C. A portion of the steam is fed through a throttling calorimeter and released to the atmosphere when the calorimeter pressure exceeds 104.3kPa. If the calorimeter's steam temperature is 113.8°C, a. What is the amount of moisture that is escaping from the boiler container? Show unit analysis & conversion.  b. Calculate the mass of the saturated vapor if the mass of the saturated liquid is 15kg. Show unit analysis & conversion.  @645.3kPa and 151.2°C: hf = 624.56kJ/kg   hfg =2123.3kJ/kg @104.3kPa and 113.8°C: h2=2506.7kJ/kg

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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.