ThermodynamicsMedium
Question
During melting of a ice slab at 273 K at atmospheric pressure:
Options
A.Positive work is done by ice-water system on atmosphere
B.Positive work is done on ice-water system by atmosphere
C.Internal energy of ice-water system increases
D.Internal energy of ice-water system decreases
Solution
As volume decreases, positive work is done on ice-water system by atmosphere.
dU = dQ - dW
Now, dQ is positive as system absorbs heat while dW is negative
Thus,
dU is positive. Internal energy of ice-water system increases
dU = dQ - dW
Now, dQ is positive as system absorbs heat while dW is negative
Thus,
dU is positive. Internal energy of ice-water system increases
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