Superheated steam is, contained in a 4.25-m rigid- tank at a constant temperature T= 350 °C. The initial pressure inside the tank is 3500 kPa. A valve is opened, and 0.75 kg/min of steam allowed to escape from the tank. How long it takes (in minutes) for pressure inside the tank to reach to 600 kPa? Select one: 61.84 69.74 82.05 Not listed 56.76 50.63 72.75

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A: For solution refer below images.

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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.