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A resistor held in running water carries electric current. Treat the resistor as the system (a) Does heat flow into the resistor? (b) Is there a flow of heat into the water?  (c) Is any work done? (d) Assuming the state of resistance to remain unchanged,  apply the first law of thermodynamics to this process.
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(c) Since there is no change in volume, no work is done. Work done is given by W = p dV. Here $$\triangle V$$ = 0.