## Self Test 9.17A

$\Delta S = \frac{q_{rev}}{T}$

Selena_Wong_1I
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### Self Test 9.17A

Determine delta S,delta Ssurr, and delta Stot for (a) the reversible, isothermal expansion and (b) the isothermal free expansion of 1.00 mol of ideal gas molecules from 10.00 atm and 0.200 L to 1.00 atm and 2.00 L at 298 K.

Why can we disregard the pressures ( 10 atm and 1 atm) when solving this problem?

Chem_Mod
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### Re: Self Test 9.17A

If Delta S = q/T, and the process is reversible, q = -w = nRT ln (V2/V1), what does this say about Delta S? And what is the relationship between q and w in this system?