(Q2) A piston cylinder device contains 5.5 kg of water. The piston has a diameter of 7 cm. The local atmospheric pressure is 94 kPa and the gravitational acceleration is 9.807 m/s. If the water starts boiling at 130°C, determine the mass of the piston in kg. Also, determine how many minutes it takes for vaporizing 36% of the water if a heater supplies heat to the water at a rate of 1.05 kW. Water

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A: GIVEN DATA INITIAL VOLUME V1=0.15m3 FINAL VOLUME V2=0.4 m3 INITIAL PRESSURE P1=300KPa RELATION GIVEN…

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Q: 2 kg of nitrogen is heated in a closed rigid vessel from T₁-20 °C to a final temperature T₂-120 °C.…

A: GivenT1=20oCT2=120oCm=2kg

Q: As shown in the figure below, 0.7 kg of water is contained within a piston–cylinder assembly at…

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Q: A cylindrical tank is filled with water at the rate of 4,550 GPM. The height of water in the tank…

A: Volume flowrate of a fluid is defined as the volume of the fluid flowing through a section per unit…

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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.