## S = q/T

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

Gabriella Bates 2L
Posts: 113
Joined: Thu Jul 11, 2019 12:15 am

### S = q/T

When using S = q/T, does the temperature need to be constant? Thanks in advance!

AArmellini_1I
Posts: 107
Joined: Fri Aug 09, 2019 12:15 am

### Re: S = q/T

Yep! If you have changing temperature then you use delta S = n C ln (T2/T1)

Megan Cao 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

### Re: S = q/T

yes, the temperature is constant for that equation. if the temperature were to change you would use S = C x ln (T2/T1). for C you would use either Cv or Cp depending on which is constant.

Jainam Shah 4I
Posts: 130
Joined: Fri Aug 30, 2019 12:16 am

### Re: S = q/T

Yes, that equation assumes that temperature is constant.

Elizabeth Harty 1A
Posts: 125
Joined: Sat Jul 20, 2019 12:16 am

### Re: S = q/T

What is this equation used for?

Verity Lai 2K
Posts: 100
Joined: Sat Aug 24, 2019 12:18 am

### Re: S = q/T

This equation is used to find entropy when the temperature is constant. If the temp or volume change, you use the equations delta S= nRln(V2/V1) or delta S= nCln(T2/T1).