Relationship between S & T


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Alexia_Vanegas_1G
Posts: 22
Joined: Wed Sep 21, 2016 3:00 pm

Relationship between S & T

Postby Alexia_Vanegas_1G » Thu Feb 02, 2017 6:16 pm

Why does an increase in temperature increase entropy if temperature is in the denominator? Is it because there is an increase of heat being added?

ssoroush 2B
Posts: 14
Joined: Wed Sep 21, 2016 2:57 pm

Re: Relationship between S & T

Postby ssoroush 2B » Thu Feb 02, 2017 7:20 pm

It's because adding more energy to the system excites the molecules and there is more disorder and chaos, which is what entropy is measuring.

Megan Yabumoto 3K
Posts: 42
Joined: Fri Jul 22, 2016 3:00 am

Re: Relationship between S & T

Postby Megan Yabumoto 3K » Fri Feb 03, 2017 9:41 am

To determine entropy, you would only use (deltaS)= (q(rev))/T for an isothermal process. (by context of your question I am assuming you are thinking of this equation) However, since there is a change of temperature, you would use the equation (deltaS)=n(Cp)(ln(T2/T1)). For an increase in temperature, the value of ln(T2/T1) will always be a positive number, resulting in an increase in entropy.

I hope this helps!


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