A piston-cylinder device is divided into two compartments, A and B, containing steam at pressure P = 500 kPa. The steam in compartment A is superheated vapor at the temperature T of quality x = 0.7. The masses of the steam in compartments A and B are ma = 0.54 kg and mB = 0.46 kg, respectively. 500°C, and the steam in compartment B is a saturated mixture (a) Determine the initial enthalpy and entropy of the system.

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A: Given:V=3 LP=200 KPat=22 min i=7.5 AV=160 V

Q: piston-cylinder arrangemen

A: SOLUTION GIVEN BELOW.

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A: vapor pressure = 200kPa loss pf heat = 10kJ PRESSURE RISES TO = 300KPA

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A:

Q: Shown in the figure, an insulated rigid tank is divided into two equal parts by a partition.…

A: Giveninsulated tankm=4kgP1=600kPaT1=300KR=0.287 kJ/kgKCv=0.7180 kJ/kgK∆U=mCvT2-T1

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A:

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Q: a rigid tank contains 2kg of saturated liquid-vapor mixture of water at 250kPa. Initially,…

A: Step 1: Step 2: Step 3: Step 4:

Q: Air undergoes a process where T₁= 200 °K and T₂ = 1200 ºk. Determine the change in specific enthalpy…

A: Given data, Air is working fluid T1 = 200 K T2 = 1200 K Find change in specific enthalpy = h2 - h1

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.