(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 4.15 mol sample of a diatomic ideal gas (γ = 1.4) expands slowly and adiabatically from a pressure of 5.60 atm and a volume of 13.5 L to a final volume of 34.5 L.

Find initial+final temperatures

2. Relevant equations

pV/T (all initial) = pV/T (all final)

3. The attempt at a solution

First I was told to solve for the final pressure so I did that easily by doing:

P(final) = P(intial) * (Vi/Vf)^γ

and got 1.5 atm

I am confused on how you find the initial temp if they didn't give the final and vice versa. That's all I really need help with.

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# Homework Help: Temperatures of an ideal gas

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