LIVE Course for free

Rated by 1 million+ students
Get app now
JEE MAIN 2023
JEE MAIN 2023 TEST SERIES
NEET 2023 TEST SERIES
NEET 2023
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
2.6k views
in Physics by (67.8k points)

Nitrogen at 600 kPa, 127°C is in a 0.5 m3 insulated tank connected to a pipe with a valve to a second insulated initially empty tank of volume 0.5 m3, The valve is opened and the nitrogen fills both tanks at a uniform state. Find the final pressure and temperature and the entropy generation this process causes. Why is the process irreversible?

1 Answer

+1 vote
by (63.2k points)
selected by
 
Best answer

CV Both tanks + pipe + valve Insulated : Q = 0 Rigid: W = 0

Energy Eq  m(u2 - u1) = 0 - 0 

=> u2 = u1 = ua1 

Entropy Eq  m(s2 − s1) = ∫ dQ/T + 1S2 gen 

= 1S2 gen (dQ = 0) 

1   P1 , T1 , Va => m = PV/RT = (600 × 0.5)/ (0.2968 × 400) = 2 .527 

2   V2 = Va + Vb ; uniform state v2 = V2 / m ; u2 = ua1 

Irreversible due to unrestrained expansion in valve P ↓ but no work out. 

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...