Find the change of entropy of a 2kg steam initially at 1MPa, 200C in a rigid...

Find the change of entropy of a 2kg steam initially at 1MPa, 200C in a rigid tank until heated to 300C.

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A closed system consists of 0.5kg of superheated steam initially at 1MPa, 300 0C. The system...

A closed system consists of 0.5kg of superheated steam initially at 1MPa, 300 0C. The system undergoes a reversible isothermal process during which the steam condenses to a saturated liquid whilst exchanging heat wih a reservoir at 300C. Show the process on a T-s diagram and calculate the change in enthropy (kJ/K) of the system, the reservoir (surroundings) and the universe.

Steam at 1MPa and 0.9 dryness fraction is throttled to a pressure 200kPa. Find the final...

Steam at 1MPa and 0.9 dryness fraction is throttled to a pressure 200kPa. Find the final state of the steam and the change in entropy during this process.

Steam, initially at 15 bar and 250oC and stored in a rigid container, is reversibly compressed...

Steam, initially at 15 bar and 250oC and stored in a rigid container, is reversibly compressed at constant temperature. During the compression, the steam receives 400 kJ/kg of work. Determine ?? and the final state of the steam. Thermodynamic data: NIST Chemistry WebBook (Thermophysical Properties of Fluid Systems)

A mass of m=1kg of steam is contained in a closed rigid container. Initially the pressure...

A mass of m=1kg of steam is contained in a closed rigid container. Initially the pressure and temperature of the steam are: p1= 1.5 MPa and t1=240?C, respectively. Then the temperature drops to T2 =100?C as the result of heat transfer to the surroundings. Determine: a) quality of the steam at the end of the process, b) percentage of volume that is occupied by the saturated liquid at the final state, c) heat transfer with the surroundings per unit mass...

An insulated, rigid vessel is initially empty (evacuated). However, it is connected to a steam line...

An insulated, rigid vessel is initially empty (evacuated). However, it is connected to a steam line that is maintained at 200 psia and 745 ∘ ∘ F. The valve is opened until the flow into the tank slows and stops (which occurs when the pressure in the tank is equal to the pressure in the steam line), at which point the valve is closed. What is the temperature within the vessel?

Steam expands in a thermally isolated turbine steadily. The inlet pressure is 1MPa and temperature is...

Steam expands in a thermally isolated turbine steadily. The inlet pressure is 1MPa and temperature is 800 C, and the exit state is 300 kPA and 150 C. a- Determine the power generated by the turbine per unit mass flow rate of steam. b- Evaluate the entropy generation rate per unit mass flow rate of steam and drive a conclusion whether the turbine operates reversibly, irreversibly or the operation is impossible.

A rigid, insulated, empty vessel is to be filled with steam from a steam line at...

A rigid, insulated, empty vessel is to be filled with steam from a steam line at 7 bar and 320°C. Steam flows into the vessel until the pressure in the vessel is 7 bar. At this instant the valve on the charging line is closed. (a) What is the temperature of the steam in the vessel at the instant the valve is closed? (b) What is the final pressure of the steam in the vessel after it has reached mutual stable equilibrium...

Calculate the change in Entropy

A 288 kg block of ice at 0∘C is placed in a large lake the temperature of the lake is just slightly higher than 0∘C and the ice melts very slowly. i) what is the entropy change of ice

A block has mass M=2kg and is initially at rest, then slides a distance L =...

A block has mass M=2kg and is initially at rest, then slides a distance L = 1.25m down a theta = 30degrees frictionless incline plane until it is momentarily brought to rest by a spring. The spring is compressed a distance X= 3cm . a) Write down expressions for the initial and final energy of the system b) Find an expression for the spring constant K in terms of L, X, theta and M and calculate K c)The experiment is...

Estimatethe total entropy change when 100.g of liquid water, initially at 298 K and 0.50 atm,is...

Estimatethe total entropy change when 100.g of liquid water, initially at 298 K and 0.50 atm,is first heated to boiling at 373 K and 1.00atm, and the steamcollected at 1.00 atmsubsequently heated and compressed to 500Kand20.atm. UseDHvap(at 100 ̊C, 1 atm)= 40.6 kJ/mol and the following values for the heat capacity:CP,m(H2O,l) = 75.2 J/(K mol), CP,m(H2O,g) = 35.0J/(K mol)

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