A rapidly spinning paddle wheel raises the temperature of 600 mL of water from 21∘C to 25∘C. How much work is done in this process?
Since it is a rapid process, so the Heat released in the process us zero
hence all the work goes in the change in internal energy of the system
m=density x volume
m=1000 x 600 x 10^-6
Since the temperature increase so the change in internal energy is positive and work is negative
so the work done is
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