Is
delta U=0
q=0
w=0
delta H=0
in an isolated system?
Isolated System
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Re: Isolated System
An isolated system means no energy or matter can flow in or out, so often that will be the case. So yea, in isolated systems w and q will both be zero and delta U is zero.
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Re: Isolated System
This fact that delta U = 0 allows us to set q = -w and do other calculations involving heat and work.
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Re: Isolated System
Yes, since no energy or matter would be flowing in or out with all of those values set to 0.
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Re: Isolated System
Yes, but be careful determining whether a question is asking for the change in energy of the system or a reaction within the system. Because all those terms could very well not be equal to zero for to a reaction within an ideal bomb calorimeter. But the total energy of the bomb calorimeter will be unchanged.
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