Change of Entropy for V and T

Volume:
Temperature:

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Melodie Oh 2A
Posts: 22
Joined: Fri Sep 29, 2017 7:06 am

Change of Entropy for V and T

Postby Melodie Oh 2A » Thu Feb 01, 2018 5:11 pm

Why does the equation of entropy change for change in volume use V2/V1 while it is P1/P2 for the change in pressure?

Audrey Goodman 1F
Posts: 31
Joined: Fri Sep 29, 2017 7:06 am

Re: Change of Entropy for V and T

Postby Audrey Goodman 1F » Thu Feb 01, 2018 5:17 pm

If you consider the equation PV=nRT, you can see that pressure (P) and volume (V) are inversely proportional. Because they are inversely proportional, when you substitute P for V, the ratio is switched.

Wayland Leung
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am
Been upvoted: 1 time

Re: Change of Entropy for V and T

Postby Wayland Leung » Thu Feb 01, 2018 8:31 pm

In the ideal gas law, pressure is the inverse of volume so you flip the pressure values in order to find the change in entropy.


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