Use the deal gas law to find the temperature rise/drop in the air (M = 18.57 kg/kmol) for the constant pressure from the atmospheric conditions (p = 100 kPa, T = 15 degrees Celsius) To v2 = 0.6 m^3/kg The universal gas constant is 7.123 kj/kmol K 0 degrees Celsius = 273.16 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.