Five Kg of water contained in a piston-cylinder assembly expands from an initial state where T1 = 400o C, P1 = 700 KPa to a final state where T2 =200o C, P2 = 300 KPa, with no significant effects of kinetic and potential energy. The accompanying provides additional data at the two states. It is claimed that the water undergoes an adiabatic process between these states, while developing work. Evaluate this claimSTATE 1                                         STATE 2T1 = 400o C                                     T2 = 200O CP1 =700KPa = 7bar                        P2 =300KPa = 3 barv1= .4397 m3/kg                           v2=.7160 m3/kgu1 =2960.9 kj/kg                          u2=2650.7 kj/kgh1 = 3268.7 kj/kg                         h2=2865.5 kj/kgs1=7.6350 kj/kg * K                      s2=7.3115 lj/kg

Question
Asked Dec 4, 2019
12 views

Five Kg of water contained in a piston-cylinder assembly expands from an initial state where T1 = 400o C, P1 = 700 KPa to a final state where T2 =200o C, P2 = 300 KPa, with no significant effects of kinetic and potential energy. The accompanying provides additional data at the two states. It is claimed that the water undergoes an adiabatic process between these states, while developing work. Evaluate this claim

STATE 1                                         STATE 2

T1 = 400o C                                     T2 = 200O C

P1 =700KPa = 7bar                        P2 =300KPa = 3 bar

v1= .4397 m3/kg                           v2=.7160 m3/kg

u1 =2960.9 kj/kg                          u2=2650.7 kj/kg

h1 = 3268.7 kj/kg                         h2=2865.5 kj/kg

s1=7.6350 kj/kg * K                      s2=7.3115 lj/kg

 

check_circle

Expert Answer

Step 1

Consider the expression of the entropy change for the system,

help_outline

Image Transcriptionclose

Ops-s generation т reversible do Here т is the entropy change causes due to reversible process and reversible is the entropy change due to irreversibility as generation In terms of specific entropy m(s -s)= т +(ds generation revers ible

fullscreen
Step 2

Consider the value provided in the problem, s1=7.635 Kj/kg K and s2=7.3115 Kj/kg K

For the checking the claim, assume the process is adiabatic. Thus, the hea...

help_outline

Image Transcriptionclose

dQ m(s, – s, ) =| +(ds) generation т revers ible 5 kg ((7.3115 kJ/kg - K)-(7.635 kJ/kg -K))=(0 kJ/K)+(ds), (-1.6175 kJ/K )=(ds)genæration generation (ds), =-1.6175 kJ/K gener ation

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Engineering

Mechanical Engineering

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Three return steam lines in a chemical processing plant enter a collection tank operating at steady ...

A: Under steady state conditions of tank, the mass flow rate for the entire system should remain consta...

question_answer

Q: please solve Q5 asap

A: Click to see the answer

question_answer

Q: I need answers to questions 4, 5, and 6 pertaining to the print provided.

A: Since we question only one question, we will answer the question no. 10. Please submit the question ...

question_answer

Q: calaculate the change in momentum of 200,000kg Boeing 777 whose speed changes from 450mph to 180mph....

A: Given data as per question

question_answer

Q: 3.6 Determine the phase or phases in a system consisting of H.O at the following conditions and sket...

A: Note: We will answer the first 3 subparts of first question (3.6) since the exact question is not sp...

question_answer

Q: I need answers to parts 10, 11, and 12, pertaining to the print provided.

A: What is the largest part in the drawing?Refer the section view of the diagram,The largest part dimen...

question_answer

Q: I need these 3 parts answered for a review activity.

A: (1)ASME standard is concerned with geometric irregularities of the surface. ASME standard includes r...

question_answer

Q: The pointer of the vibration measuring instrument is observed to move between the 0.1 and 0.3 marks ...

A: Calculate the natural frequency.

question_answer

Q: Technician A stresses the need to follow the manufacturer's recommendations for preventive maintenan...

A: Every vehicle is delivered with a service manual with manufacturer’s recommendation. The manufacture...