Q5: A cylinder piston contains 1001 air at 110 kPa. The air is then compressed in a reversible polytropic process to a final state of 800 kPa & 0.0218m; assume that the heat transfer is40.28 kj/kg to the ambient. Determine the polytropic index, the initial and final temperature of the air, the mass of the air and the total entropy generation assuming the initial temperature as a surrounding temperature.

Q: Air (MW=29 kg/kmol) at 115.00 kPa and 285.00 K is compressed steadily to 600.0 kPaThe mass flow rate…

A: The inlet temperature of the air, The inlet pressure isThe exit pressure is The heat loss, The…

Q: Oxygen (molar mass 32 kg/k moljexpands reversibly in a cylinder behind a piston at a constant…

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Q: Practical examples 4. Air at a temperature of 75 °C and a pressure of 400 kPa occupies a volume of…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: Q1: Steam at 10 MPa and 530 °C, 70 m/s, at inlet a turbine and leaves at 12 kPa with a quality of…

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Q: find the work with 2.5kg of nitrogen in adiabatic compression from a specific volume of 0.605 m^3/kg…

A: Calculated work required for adiabatic compression of nitrogen.

Q: Q3: 1kg of air can expand reversibly in cylinder behind a piston in such a way that the temperature…

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Q: A heat source at 600 K loses 1000 kJ of heat to a sink at 300 K. The Entropy generated in this…

A: Given data as per question Temperature of heat source=600 k heat=1000 kjtemperature of sink =300 kwe…

Q: plunged into a tank containing 4 kg of liquid water initially at 250K. The copper part and water can…

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Q: subjected to a reversible adiabatic compression process to a final volume of 0.01 m3.Assuming the…

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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.