Methane is throttled from a saturated liquid at 152.9 K (Stream 1) to 0.464 MPa (Stream 2) where it is a saturated mixture. Assuming methane has a constant Cp of 2.2537 kJ/(kg K), use the Generalized Charts provided on eClass to determine: a) the pressure of Stream 1 (in MPa) and the temperature of Stream 2 (in K) b) the quality of the exit stream in % c) the entropy generation per kg being throttled, in kJ/(kg K) d) the specific volume of the methane in Stream 1, in m3/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.