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Plaster of Paris, CaSO4 • ½ H2O(s), reacts with liquid water to form gypsum, CaSO4•2H2O(s). a....

Plaster of Paris, CaSO4 • ½ H2O(s), reacts with liquid water to form gypsum, CaSO4•2H2O(s).

a. Write a balanced chemical equation for this reaction.

b. Use the information provided below to determine if the formation of gypsum is spontaneous under standard state conditions.

*Please show all of your work on your pdf; you can leave this answer box blank if you want.*

Substance

ΔG°f (kJ/mol)

H2O (g)

-228.61

H2O (l)

–237.2

CaSO4 • ½ H2O(s)

–1435.2

CaSO4•2H2O(s)

–1795.7

  

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