- #1

yakattack

- 5

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**1.**

Homework Statement

Homework Statement

1) A 200 litre container of boiling water and a 200 litre of ice cold water are used as heat source and sink for a carnot engine. Calculate the maximum amount of useful work that can be obtained from the system and the final temperature of the two containers of water.

2) If the containers were connected by a conductiong bar so that they came into hermal equilibrium calculate the final temperature and change in entropy of the system.

## Homework Equations

[tex]\Delta[/tex]s = [tex]\int(dQ/T)dt[/tex]

w = [tex]\eta[/tex]Q1

## The Attempt at a Solution

1) Entropy is is conserved, so cln373+cln273 = 2clnT(final)

hence T(final) = 319K

not sure if this is correct.

[tex]\eta[/tex] = (1 - [tex]273/373[/tex]) = 0.268

w = 0.268*Q1

is this the correct way to calculate the work? If so how do i know Q1?

2) not sure how to do this part.

If we assume a reversible process, then s is constant but how do i know the final temperature?