Figuring Out Heat Transfer & Entropy of Steam at 10 MPa

Click For Summary
To determine the entropy change and heat transfer for water transitioning from liquid to steam at 10 MPa, steam tables are essential for obtaining the specific entropy values (sfg) and heat transfer per unit mass. The problem allows for assumptions regarding the initial temperature, which can simplify calculations. The focus should be on the vaporization process, utilizing the properties listed in the steam tables. This approach will yield the necessary values for entropy and heat transfer. Accurate application of steam tables is crucial for solving this thermodynamic problem effectively.
Nick Goodson
Messages
7
Reaction score
2
Thread moved from the technical forums to the schoolwork forums
Hello everybody, would somebody please put me on the right track to answering this question?

'Consider water undergoes a heat transfer
at constant pressure of 10 MPa and
changes from liquid to steam. Find the
entropy of the system (sfg) as well as the
heat transfer per unit mass in this
process?'

Is this just looking at steam tables and working per unit mass?

I'd appreciate any help
Thanks
 
Physics news on Phys.org
The problem does not specify initial temperature.
If you are free to assume, you could use steam tables per unit mass for the vaporization process only.
 
  • Like
Likes Nick Goodson
Lnewqban said:
The problem does not specify initial temperature.
If you are free to assume, you could use steam tables per unit mass for the vaporization process only.
Thanks Lnewqban
 
Thread 'Correct statement about size of wire to produce larger extension'
The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...

Similar threads

Replies
9
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 42 ·
2
Replies
42
Views
6K
  • · Replies 1 ·
Replies
1
Views
6K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K