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Determine the entropy change for freezing 6.33 grams of C2H5OH at 158.7 K? H =-4600 J/mol. Express your answer in units of J/K.

Determine the name of the hydrate if this hydrate on heating 5.03 g of hydrated barium chloride (BaCl2-xH2O) 4.23 grams is left behind.

 

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