Entropy change

  • Thread starter swain1
  • Start date
  • #1
swain1
30
0

Homework Statement


Calculate the changes in total entropy of the universe as a result of the following processes:
(a) A block of mass 6kg and heat capacity of 300 J/K/kg at 150oC is placed in a lake at 0oC.

Homework Equations





The Attempt at a Solution


I think I have found the entropy change of the block as -788 J/K. I am not sure how to find the entropy change of the lake though as I don't know the mass.
Thanks for any help.
 

Answers and Replies

  • #2
PhyzicsOfHockey
42
0
The change should be equal but opposite. Heat is leaving the block and going into the water... What leave the block must enter the water...
 
  • #3
swain1
30
0
yes the energy transfer will be the same but not the entropy.??
 

Suggested for: Entropy change

Replies
1
Views
631
  • Last Post
Replies
1
Views
558
  • Last Post
Replies
7
Views
566
  • Last Post
Replies
3
Views
722
Replies
1
Views
471
Replies
4
Views
412
Replies
4
Views
711
Top