HW 9.13


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HW 9.13

Postby William_Lee_Dis_3H » Mon Jan 23, 2017 5:48 pm

When calculating the entropy change due to the change in temperature, where does the the equation delta S = n R ln (t2/t1) come from in the solutions manual? Shouldn't the equation be delta S = n C ln(t2/t1)? And how are we supposed to assume that there are 1.00 moles of N2 gas without the problem explicitly stating it?

Parsia Vazirnia 2L
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Re: HW 9.13

Postby Parsia Vazirnia 2L » Mon Jan 23, 2017 11:22 pm

I second this. I need help on this problem as well.

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Re: HW 9.13

Postby Chem_Mod » Tue Jan 24, 2017 12:33 am

Since this question asks you to assume that the N2 exhibits ideal gas behavior, the variation of the entropy equation S= nRln(T2/T1). Additionally, since the question mentions that the gas is ideal and no number of moles is otherwise specified, the number of moles in the container is implied to be 1 mole. For more information on this, refer to pg. 323.

Jessica Chern 1H
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Re: HW 9.13

Postby Jessica Chern 1H » Sat Jan 28, 2017 10:07 pm

I thought that the equation using R was only for volume or pressure (ΔS = nR ln(V2/V1)). Is it the same for temperature too? Where did that equation come from?

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