### Entropy Changes of a Physical State

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**Sun Jan 24, 2016 1:27 am**The book covers how to calculate the entropy of transition at a temperature other than the normal transition temperature. As an example, the entropy of vaporization of water at 25 degrees Celsius and 1bar would be:

However, wouldn't the change in entropy from the heating and the change in entropy of the cooling cancel each other out, as the ln(T

However, wouldn't the change in entropy from the heating and the change in entropy of the cooling cancel each other out, as the ln(T

_{1}/T_{2}) is the negative value of ln(T_{2}/T_{1}). Then, the change in entropy would just be the entropy of vaporization, and temperature becomes insignificant..?