- #1
Robsta
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Homework Statement
1kg of silver is heated by a large heat reservoir at 373 K from 273K. Calculate the change of entropy in:
a) the silver
b) the reservoir
c) the universe.
Homework Equations
ΔS = ∫dQ/T
The Attempt at a Solution
calculating the change in the silver first
ΔS = ∫dQ/T
= C∫dT/T
= Cln(T2/T1)
= 0.312
This is fine, I understand it. Now I need to work out the entropy change in the large reservoir. Since the change happens spontaneously, it isn't reversible and the entropy of the universe increases. This means that I can't just take the negative of the change in the silver.
Since the temperature of the reservoir doesn't change, is there no effective change in the entropy? This obviously shouldn't be the case because it would violate the second law. I'd appreciate any insight that can be offered.