Calculate S for each of the following changes in state of 0.250 mol of a perfect monoatomic
gas with Cv.m = 1.5R for all temperatures: (a)(1.50 atm, 400 K) (3.00 atm, 600 K); (b) (2.50
atm, 20.0 L) (2.00 atm, 30.0 L); (c) (28.5 L, 400 K) (42.0 L , 400 K).
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The conversion of super cooled water to ice at  is as follows:

The process is takes place under 1 atm pressure.
Calculate the entropy for the three processes and add them to get the final entropy.
The mass of super cooled water is 10.0 g.
The heat capacity value of water at  is  and at  is  .
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