3)In the first case, there is 5 kg of water and 60% dryness at 300 kPa (3 bar) pressure in a closed container whose volume does not change. Heat transfer is performed until the closed cup water reaches a pressure value of 1 MPa. The limit temperature of the closed container will be 300◦C. Note: Changes in kinetic and potential energies are minor. Note = 100 kPa, T0 = 25 ◦C and T (K) = 273.15 + ◦C

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Q: 21. The state of an ideal gas with Cp (5/2)R is changed from P1 bar and V 12 m to P- 12 bar and…

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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.