Entropy Decreasing, Temperature Increasing
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Entropy Decreasing, Temperature Increasing
For problems like 4F.1 and 4F.3, why does change in entropy decrease when temperature is increased? I understand that the equation delta(S) = q/T so increasing the denominator will increase delta(S), but can someone explain conceptually why entropy decreases when temperature increases? I thought higher temperature would have higher entropy because the molecules have more kinetic energy.
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Re: Entropy Decreasing, Temperature Increasing
In questions 4F.1 and 4F.3, they are saying that the change in entropy is less when the object is at a higher temperature, not that entropy is decreasing.
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Re: Entropy Decreasing, Temperature Increasing
Because there is already more disorder at a higher temperature, there will not be as great of a change in entropy.
Re: Entropy Decreasing, Temperature Increasing
This ties in with the formula deltaS = (q reversible) / T , so with higher T the change in S is reduced.
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Re: Entropy Decreasing, Temperature Increasing
Entropy doesn't decrease with temperature, but the entropy change decreases with higher temperature. This is because a change to a lower temperature system will affect it more drastically than it would affect the higher temperature system, since it already has a higher entropy.
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Re: Entropy Decreasing, Temperature Increasing
At a higher temperature, entropy is already higher than it would be at a lower temperature. As a result, the change in entropy will be lower.
Re: Entropy Decreasing, Temperature Increasing
Why/when does entropy have a negative value? I thought that entropy only increases? Or is that only for the entire universe?
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