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Yes. You first assume constant temperature and calculate the change in entropy due to change in volume. Next, assume constant volume and calculate the change in entropy due the change in temperature. Just add these together to find the total change in entropy. (You could also do this the other way around and calculate the change due to temp. and then the change due to volume).
If there is a change in volume and in temperature, you split the problem up into two steps, first using the deltaS equation with V2/v1 and then using the equation with T2/T1. These two deltaS values added together are equal to the deltaS of the whole system
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