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## Homework Statement

Suppose C

_{A}= C

_{B}= C in equations 2.93 and 2.109 (shown below). Compare the form of expressions for the final temperature.

## Homework Equations

(2.93) [itex]T = \frac{C_{A}T_{A} + C_{B}T_{B}}{C_{A} + C_{B}}[/itex]

(2.109) [itex]T = T_{A}^{\frac{C_{A}}{(C_{A}+C_{B})}} T_{B}^{\frac{C_{B}}{(C_{A}+C_{B})}}[/itex]

(2.93) is for an irreversible process

(2.109) is for a reversible process

T is the final equilibrium temperature when two bodies are put into thermal contact.

C is specific heat capacity

## The Attempt at a Solution

The problem is that I don't know where to start. I'm told in the sentence before equation (2.93) that in that equation, T

_{A}> T

_{B}. Other than that, I'm not sure exactly how or what I'm supposed to be deducing about the final temperature just from looking at the two equations. I'm told the answer is that the final temperature will be T

^{A}but have no idea why. What's my first step? How should I start thinking about it?

I'd appreciate any guidance. Thanks :)