1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
babunello [35]
3 years ago
15

One kilogram of water contained in a piston–cylinder assembly, initially saturated vapor at 460 kPa, is condensed at constant pr

essure to saturated liquid. Consider an enlarged system consisting of the water and enough of the nearby surroundings that heat transfer occurs only at the ambient temperature of 25 C. Assume the state of the nearby surroundings does not change during the process, and ignore kinetic and potential energy effects. For the enlarged system, determine the heat transfer, in kJ, and the entropy production, in kJ/K.
Engineering
1 answer:
Reptile [31]3 years ago
6 0

Answer:

Q = 2118.075\,kJ, S_{gen} = 2.0836\,\frac{kJ}{K}

Explanation:

The process is modelled after the First and Second Law of Thermodynamic:

-Q + m\cdot P\cdot (\nu_{1} - \nu_{2}) = m\cdot (u_{2}-u_{1})

-\frac{Q}{T_{surr}} + S_{gen} = m\cdot (s_{2}-s_{1})

The properties of the fluid are obtained from steam tables:

Inlet

\nu = 0.40610\,\frac{m^{3}}{kg}

u = 2557.8\,\frac{kJ}{kg}

s = 6.8490\,\frac{kJ}{kg\cdot K}

Outlet

\nu = 0.001089\,\frac{m^{3}}{kg}

u = 626.03\,\frac{kJ}{kg}

s = 1.8285\,\frac{kJ}{kg\cdot K}

The heat transfer is:

Q = m\cdot [P\cdot (\nu_{1}-\nu_{2})+(u_{1}-u_{2})]

Q = (1\,kg)\cdot \left[(460\,kPa)\cdot \left(0.40610\,\frac{m^{3}}{kg} - 0.001089\,\frac{m^{3}}{kg} \right) + \left(2557.8\,\frac{kJ}{kg} - 626.03\,\frac{kJ}{kg}  \right)\right]

Q = 2118.075\,kJ

Lastly, the entropy production is:

S_{gen} = \frac{Q}{T_{surr}} + m\cdot (s_{2}-s_{1})

S_{gen} = \frac{2118.075\,kJ}{298.15\,K} + (1\,kg)\cdot \left(1.8285\,\frac{kJ}{kg\cdot K}-6.8490\,\frac{kJ}{kg\cdot K}  \right)

S_{gen} = 2.0836\,\frac{kJ}{K}

You might be interested in
Which of the following maintenance items helps to ensure the vehicles engine lasts as long as possible?
Paladinen [302]

Answer:

c

because oil is preventing corrosion and rust

8 0
2 years ago
Fibonacci sequence has many applications in Computer Science. Write a program to generate Fibonacci numbers as many as desired.
VikaD [51]

Answer:

The Python Code for Fibonacci Sequence is :

# Function for nth Fibonacci number  

def Fibonacci(n):  

if n<0:  

 print("Incorrect input")  

# First Fibonacci number is 0  

elif n==0:  

 return 0

# Second Fibonacci number is 1  

elif n==1:  

 return 1

else:  

 return Fibonacci(n-1)+Fibonacci(n-2)  

# Driver Program  

print(Fibonacci(9))  

Explanation:

The Fibonacci numbers are the numbers in the following integer sequence.

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ……..

In mathematical terms, the sequence Fn of Fibonacci numbers is defined by the recurrence relation

Fn = Fn-1 + Fn-2

with seed values

F0 = 0 and F1 = 1.

8 0
3 years ago
Read 2 more answers
Drag each tile to the correct box.
Trava [24]

Answer:

Bluray

DVD

CD

Explanation:

Blu ray can hold 25gb per layer

Dvd can hold 4.7GB on a single layer

Cd can hold around 737 mb

Also, dvds can go up to 2 layers

Blu ray can go up to 4

6 0
3 years ago
Ben İngiliz oldum düzelte bilirmiyim
Lelu [443]

Answer:

What laguange is that?

Explanation:

7 0
2 years ago
You are investigating surface hardening in iron using nitrogen gas. Two 5 mm thick slabs of iron are separately exposed to nitro
Luden [163]

Answer and Explanation:

The explanation is attached below

4 0
3 years ago
Other questions:
  • Sea X una variable aleatoria con funci´on de densidad
    9·1 answer
  • When the vessel and its contents are warmed to 100 °C, Q decomposes into its constituent elements. What is the total pressure, a
    11·1 answer
  • Water (cp = 4180 J/kg·°C) enters the 2.5 cm internal diameter tube of a double-pipe counter-flow heat exchanger at 17°C at a rat
    7·1 answer
  • The water in an 8-m-diameter, 3-m-high above-ground swimming pool is to be emptied by unplugging a 3-cm-diameter, 25-m-long hori
    9·1 answer
  • A mechanical system comprises three subsystems in series with reliabilities of 98, 96, and 94 percent. What is the overall relia
    10·1 answer
  • How many kg moles of Sodium Sulphate will contain 10 kg of<br> Sodium?
    10·2 answers
  • Calculate the radius of a circular orbit for which the period is 1 day​
    13·1 answer
  • Which of the following characteristics would not give animals an advantage in the ocean?
    13·1 answer
  • A particular electromagnetic wave travelling in vacuum is detected to have a frequency of 3 × 10 12 Hz. How much time will it ta
    6·1 answer
  • Write down the tracking error such that the adaptive cruise control objective is satisfied.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!