one thermodynamic problem
Posted: Tue Nov 08, 2005 10:20 pm
I find it hard to analyze the system (1)+(2), the system (3)+(4), and the system (6).
thank u in ad:)
*Th8,9 Question 8-9 refer to the following processes involving systems labeled by numbers (1) through (8).
A bar of iron (1) at 300K is brought into thermal contact with a body (2) at 400K, the two being thermally isolated from all other systems.
An ideal gas (3) is compressed reversibly while in contact with a reservoir (4), the two being thermally isolated from all other systems.
A body of water (5) freezes reversibly.
A container of water (6) is stirred and its temperature increases by 1K.
A chemical reaction takes place in an isolated system (7).
A Carnot engine (8) operates in a cycle.
8. For which of the following systems does the entropy decrease?
(A) 1
(B) 4
(C) 5
(D) 6
(E) 7
9. For which of the following systems does the entropy increase?
(A) 2
(B) 3
(C) 8
(D) 1 and 2 combined
(E) 3 and 4 combined
thank u in ad:)
*Th8,9 Question 8-9 refer to the following processes involving systems labeled by numbers (1) through (8).
A bar of iron (1) at 300K is brought into thermal contact with a body (2) at 400K, the two being thermally isolated from all other systems.
An ideal gas (3) is compressed reversibly while in contact with a reservoir (4), the two being thermally isolated from all other systems.
A body of water (5) freezes reversibly.
A container of water (6) is stirred and its temperature increases by 1K.
A chemical reaction takes place in an isolated system (7).
A Carnot engine (8) operates in a cycle.
8. For which of the following systems does the entropy decrease?
(A) 1
(B) 4
(C) 5
(D) 6
(E) 7
9. For which of the following systems does the entropy increase?
(A) 2
(B) 3
(C) 8
(D) 1 and 2 combined
(E) 3 and 4 combined